21656025104524 has 12 divisors (see below), whose sum is σ = 37898225751400. Its totient is φ = 10827960604128.

The previous prime is 21656025104507. The next prime is 21656025104531. The reversal of 21656025104524 is 42540152065612.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12041409 + ... + 13722520.

Almost surely, 2^{21656025104524} is an apocalyptic number.

It is an amenable number.

21656025104524 is a deficient number, since it is larger than the sum of its proper divisors (16242200646876).

21656025104524 is a wasteful number, since it uses less digits than its factorization.

21656025104524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25974072 (or 25974070 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 21656025104524 in words is "twenty-one trillion, six hundred fifty-six billion, twenty-five million, one hundred four thousand, five hundred twenty-four".