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24 is a congruent number, as 24 is the area of a right triangle with a rational number of sides. 24 is a semi-meandric number, where an order-6 semi-meander intersects an oriented ray in R2 at 24 points. 24 is the number of digits of the fifth and largest known unitary perfect number, when written in decimal: 146361946186458562560000.
In mathematics. 34 is the twelfth semiprime, [1] with four divisors including 1 and itself. Specifically, 34 is the ninth distinct semiprime, it being the sixth of the form . Its neighbors 33 and 35 are also distinct semiprimes with four divisors each, where 34 is the smallest number to be surrounded by numbers with the same number of divisors ...
Twenty is a pronic number, as it is the product of consecutive integers, namely 4 and 5. [3] It is the third composite number to be the product of a squared prime and a prime (and also the second member of the 22 × q family in this form). It has an aliquot sum of 22; a semiprime, within an aliquot sequence of four composite numbers (20, 22, 14 ...
Inside Lie algebras : 72 is the number of vertices of the six-dimensional 122 polytope, which also contains as facets 720 edges, 702 polychoral 4-faces, of which 270 are four-dimensional 16-cells, and two sets of 27 demipenteract 5 -faces. These 72 vertices are the root vectors of the simple Lie group.
Forty-nine is the square of the prime number seven and hence the fourth non-unitary square prime of the form p2. 49 has an aliquot sum of 8; itself a prime power, and hence an aliquot sequence of two composite members (49, 8, 7, 1 ,0). It appears in the Padovan sequence, preceded by the terms 21, 28, 37 (it is the sum of the first two of these ...
64 is the atomic number of gadolinium, a lanthanide . 64 is the number of codons in the RNA codon table of the genetic code . 64 is the size in bits of certain data types in some computer programming languages, where a 64-bit integer can represent values up to 2 64 = 18,446,744,073,709,551,616. Base 64 is used in Base64 encoding, and other data ...
It is a perfect totient number. [3] *39 is the sum of five consecutive primes (3 + 5 + 7 + 11 + 13) and also is the product of the first and the last of those consecutive primes. Among small semiprimes only three other integers (10, 155, and 371) share this attribute. 39 also is the sum of the first three powers of 3 (3 1 + 3 2 + 3 3 ).
Fourteen is the seventh composite number. It is the third distinct semiprime, [1] being the third of the form (where is a higher prime). More specifically, it is the first member of the second cluster of two discrete semiprimes (14, 15 ); the next such cluster is ( 21, 22 ), members whose sum is the fourteenth prime number, 43.