21631022976 has 64 divisors (see below), whose sum is σ = 59438725200. Its totient is φ = 6961704960.

The previous prime is 21631022879. The next prime is 21631022993. The reversal of 21631022976 is 67922013612.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960085 + ... + 982356.

Almost surely, 2^21631022976 is an apocalyptic number.

It is an amenable number.

21631022976 is an abundant number, since it is smaller than the sum of its proper divisors (37807702224).

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

21631022976 is a wasteful number, since it uses less digits than its factorization.

21631022976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942487 (or 1942475 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 21631022976 in words is "twenty-one billion, six hundred thirty-one million, twenty-two thousand, nine hundred seventy-six".