21620610432723 has 32 divisors (see below), whose sum is σ = 29224775172096. Its totient is φ = 14216175986688.

The previous prime is 21620610432703. The next prime is 21620610432763. The reversal of 21620610432723 is 32723401602612.

It is not a de Polignac number, because 21620610432723 - 2⁵ = 21620610432691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21620610432703) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136227711 + ... + 136386327.

It is an arithmetic number, because the mean of its divisors is an integer number (913274224128).

Almost surely, 2^{21620610432723} is an apocalyptic number.

21620610432723 is a deficient number, since it is larger than the sum of its proper divisors (7604164739373).

21620610432723 is a wasteful number, since it uses less digits than its factorization.

21620610432723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160323.

The product of its (nonzero) digits is 145152, while the sum is 39.

The spelling of 21620610432723 in words is "twenty-one trillion, six hundred twenty billion, six hundred ten million, four hundred thirty-two thousand, seven hundred twenty-three".