20688804264 has 64 divisors (see below), whose sum is σ = 53144611200. Its totient is φ = 6706761984.

The previous prime is 20688804263. The next prime is 20688804271. The reversal of 20688804264 is 46240888602.

It is not an unprimeable number, because it can be changed into a prime (20688804263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2621877 + ... + 2629755.

It is an arithmetic number, because the mean of its divisors is an integer number (830384550).

Almost surely, 2^20688804264 is an apocalyptic number.

20688804264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20688804264 is an abundant number, since it is smaller than the sum of its proper divisors (32455806936).

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

20688804264 is a wasteful number, since it uses less digits than its factorization.

20688804264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10882 (or 10878 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 48.

The spelling of 20688804264 in words is "twenty billion, six hundred eighty-eight million, eight hundred four thousand, two hundred sixty-four".