21620610431105 has 32 divisors (see below), whose sum is σ = 31217360732160. Its totient is φ = 14042725133760.

The previous prime is 21620610431051. The next prime is 21620610431129. The reversal of 21620610431105 is 50113401602612.

It is not a de Polignac number, because 21620610431105 - 2²⁸ = 21620341995649 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 734240 + ... + 6616670.

It is an arithmetic number, because the mean of its divisors is an integer number (975542522880).

Almost surely, 2^{21620610431105} is an apocalyptic number.

It is an amenable number.

21620610431105 is a deficient number, since it is larger than the sum of its proper divisors (9596750301055).

21620610431105 is a wasteful number, since it uses less digits than its factorization.

21620610431105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5887989.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 21620610431105 in words is "twenty-one trillion, six hundred twenty billion, six hundred ten million, four hundred thirty-one thousand, one hundred five".