21037599317952 has 84 divisors (see below), whose sum is σ = 68914834286896. Its totient is φ = 6010742661120.

The previous prime is 21037599317939. The next prime is 21037599317983. The reversal of 21037599317952 is 25971399573012.

21037599317952 is a `hidden beast` number, since 2 + 1 + 0 + 3 + 7 + 599 + 31 + 7 + 9 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 21037599317952.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2608825249 + ... + 2608833312.

Almost surely, 2^{21037599317952} is an apocalyptic number.

It is an amenable number.

21037599317952 is an abundant number, since it is smaller than the sum of its proper divisors (47877234968944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21037599317952 is a wasteful number, since it uses less digits than its factorization.

21037599317952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5217658586 (or 5217658573 counting only the distinct ones).

The product of its (nonzero) digits is 32148900, while the sum is 63.

The spelling of 21037599317952 in words is "twenty-one trillion, thirty-seven billion, five hundred ninety-nine million, three hundred seventeen thousand, nine hundred fifty-two".