17 (seventeen) is the natural number following 16 and preceding 18. << 10 11 12 13 14 15 16 17 18 19 >> List of numbers -- Integers 0 10 20 30 40 50 60 70 80 90 >> 17 number - In mathematics. Seventeen is the 7th prime number. The next prime is nineteen, with which it comprises a twin prime. 17 is the sum of the first four primes. 17 is the sixth Mersenne prime exponent, yielding 131071. 17 is an Eise ...

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56 is the sum of the first six triangular numbers (making it a tetrahedral number), as well as the sum of six consecutive primes (3 + 5 + 7 + 11 + 13 + 17). It is also a tetranacci number and a pronic number. The maximum determinant in an 8 by 8 matrix of zeroes and ones is 56. ...

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17 (seventeen) is the natural number following 16 and preceding 18. << 10 11 12 13 14 15 16 17 18 19 >> List of numbers -- Integers 0 10 20 30 40 50 60 70 80 90 >> 17 number - In mathematics. Seventeen is the 7th prime number. The next prime is nineteen, with which it comprises a twin prime. 17 is the sum of the first four primes. 17 is the sixth Mersenne prime exponent, yielding 131071. 17 is an Eise ...

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18 (eighteen) is the natural number following 17 and preceding 19. << 10 11 12 13 14 15 16 17 18 19 >> List of numbers -- Integers 0 10 20 30 40 50 60 70 80 90 >> 18 number - In mathematics. Eighteen is a composite number, its proper divisors being 1, 2, 3, 6 and 9. It is a heptagonal number, and as the sum of the first three pentagonal numbers, it is a pentagonal pyramidal number. It is a Harshad num ...

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10 (ten) is the natural number following 9 and preceding 11. << 10 11 12 13 14 15 16 17 18 19 >> List of numbers -- Integers 0 10 20 30 40 50 60 70 80 90 >> deci- (from Latin) 10 number - In mathematics. Ten is a composite number, its proper divisors being 1, 2 and 5. Ten is the smallest noncototient, a number that can not be expressed as the difference between any integer and ...

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Seventy-two is the sum of four consecutive primes (13 + 17 + 19 + 23), as well as the sum of six consecutive primes (5 + 7 + 11 + 13 + 17 + 19). 72 is a Harshad number and a pronic number. In normal space, the exterior angles of an equilateral pentagon measure 72 degrees each. There are 17 solutions to the equation φ(x) = 72, more than any integer below 72, making it a highly totient number. ...

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Forty-eight is the double factorial of 6, four dozens, a highly composite number, a 17-gonal number and a Harshad number. 48 is the smallest number with exactly ten divisors. There are 11 solutions to the equation φ(x) = 48, namely 65, 104, 105, 112, 130, 140, 144, 156, 168, 180 and 210. This is more than any integer below 48, making 48 a highly totient number. ...

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As the sum of the first five pentagonal numbers, seventy-five is a pentagonal pyramidal number. It is also an enneagonal number. It is also a Keith number, because it recurs in a Fibonacci-like sequence started from its base 10 digits: 7, 5, 12, 17, 29, 46, 75... But there is no integer that added up to its own digits adds up to 75, hence 75 is a self number. There are 75 uniform polyhedra. ...

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19 (nineteen) is the natural number following 18 and preceding 20. It is a prime number. << 10 11 12 13 14 15 16 17 18 19 >> List of numbers -- Integers 0 10 20 30 40 50 60 70 80 90 >> 19 number - In mathematics. Nineteen is the 8th smallest prime number. The sequence continues 23, 29, 31, 37... 19 is the seventh Mersenne prime exponent. It is also a Keith number, because it recurs in a Fibonac ...

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16 (sixteen) is the natural number following 15 and preceding 17. << 10 11 12 13 14 15 16 17 18 19 >> List of numbers -- Integers 0 10 20 30 40 50 60 70 80 90 >> 16 number - In The United States of America. Sixteen is a turning point age for young Americans. Not only do American sixteen year olds gain the ability to aquire an official driver's license, but female sixteen year olds also gain privacy la ...

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See also Thirteen, a 2003 movie, 13 an album by British band Blur, Thirteen an album by Teenage Fanclub. 13 (thirteen) is the natural number following 12 and preceding 14. << 10 11 12 13 14 15 16 17 18 19 >> List of numbers -- Integers 0 10 20 30 40 50 60 70 80 90 >> 13 number - In mathematics. Thirteen is the 6th smallest prime number; the next is seventeen. 13 is the second Wilson prim ...

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11 (eleven) is the natural number following 10 and preceding 12. Eleven is the smallest positive integer requiring three syllables in English. << 10 11 12 13 14 15 16 17 18 19 >> List of numbers -- Integers 0 10 20 30 40 50 60 70 80 90 >> 11 number - In mathematics. Eleven is the 5th smallest prime number. 11 is the fourth Sophie Germain prime, the third safe prime, the fourth Lucas prime, and the fir ...

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48 is the natural number following 47 and preceding 49. << 40 41 42 43 44 45 46 47 48 49 >> List of numbers -- Integers 0 10 20 30 40 50 60 70 80 90 >> 48 number - In mathematics. Forty-eight is the double factorial of 6, four dozens, a highly composite number, a 17-gonal number and a Harshad number. 48 is the smallest number with exactly ten divisors. There are 11 solutions to t ...

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<< 10 11 12 13 14 15 16 17 18 19 >> List of numbers -- Integers 0 10 20 30 40 50 60 70 80 90 >> 12 (twelve) is the natural number following 11 and preceding 13. A group of twelve things is called a Duodecad. 12 number - In mathematics. Twelve is a composite number, the smallest number with exactly six divisors, its proper divisors being 1, 2, 3, 4 and 6. Twelve is also a highly composite ...

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14 (fourteen) is the natural number following 13 and preceding 15. << 10 11 12 13 14 15 16 17 18 19 >> List of numbers -- Integers 0 10 20 30 40 50 60 70 80 90 >> 14 number - In mathematics. Fourteen is a composite number, its proper divisors being 1, 2 and 7. In base fifteen and higher bases (such as hexadecimal), fourteen is represented as E. Fourteen is the sum of the first th ...

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34 has four divisors, 1, 2, 17 and itself. Its neighbors, 33 and 35 also have four divisors each, and 34 is the smallest number to be surrounded by numbers with the same number of divisors as it has. It is the ninth Fibonacci number and a companion Pell number. Since it is an odd-indexed Fibonacci number, 34 is a Markov number, appearing in solutions with other Fibonacci numbers, such as (1, 13, 34), (1, 34, 89), etc. This number is the magic constant of a 4 by 4 magic square: This number is also the magic constant of n-Queens Problem for n = 4 ...

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It is the square of 6 as well as a triangular number, making it a triangular square number. It is also a 13-gonal number and a highly composite number. It is a Harshad number. This number is the sum of a twin prime (17 + 19), and the sum of the cubes of the first three integers. 36 is the smallest number with exactly 9 divisors. 36 is the smallest number n with exactly 8 solutions to the equation φ(x) = n. 36 is the largest numeric base that some computer systems support because it exhausts ...

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It is the 20th prime number. The next is 73, with which it composes a twin prime. It is also a permutable prime with 17. If we add up the primes less than 71 (2 through 67), we get 568, which is divisible by 71, 8 times. 71 is the largest supersingular prime. Also, 712 = 7! + 1, making it part of the last known pair of Brown numbers, as (71, 7). It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1 ...

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Fifty-three is the 16th smallest prime number. The next is fifty-nine. Fifty-three is also a Sophie Germain prime, and the sum of five consecutive primes (5 + 7 + 11 + 13 + 17). It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1. 53 written in hexadecimal is 35, that is, the same characters used in the decimal representation, but reversed. Three multiples of 53 share this property: 371 = 17316, 5141 = 141516, 99481 = 1849916. But 53 can not be expressed as the sum of any integer and ...

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