21620610431104 has 64 divisors (see below), whose sum is σ = 44117475948000. Its totient is φ = 10550625380352.

The previous prime is 21620610431051. The next prime is 21620610431129. The reversal of 21620610431104 is 40113401602612.

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

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, 9248469 + ... + 11347924.

Almost surely, 2^{21620610431104} is an apocalyptic number.

It is an amenable number.

21620610431104 is an abundant number, since it is smaller than the sum of its proper divisors (22496865516896).

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

21620610431104 is a wasteful number, since it uses less digits than its factorization.

21620610431104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20596605 (or 20596593 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 21620610431104 in words is "twenty-one trillion, six hundred twenty billion, six hundred ten million, four hundred thirty-one thousand, one hundred four".