20313313656564 has 24 divisors (see below), whose sum is σ = 47526881008768. Its totient is φ = 6752654674560.

The previous prime is 20313313656553. The next prime is 20313313656599. The reversal of 20313313656564 is 46565631331302.

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, 2306230117 + ... + 2306238924.

Almost surely, 2^{20313313656564} is an apocalyptic number.

It is an amenable number.

20313313656564 is an abundant number, since it is smaller than the sum of its proper divisors (27213567352204).

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

20313313656564 is a wasteful number, since it uses less digits than its factorization.

20313313656564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4612469415 (or 4612469413 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 48.

Adding to 20313313656564 its reverse (46565631331302), we get a palindrome (66878944987866).

The spelling of 20313313656564 in words is "twenty trillion, three hundred thirteen billion, three hundred thirteen million, six hundred fifty-six thousand, five hundred sixty-four".