20564762700 has 72 divisors (see below), whose sum is σ = 60509252160. Its totient is φ = 5390984000.

The previous prime is 20564762639. The next prime is 20564762731. The reversal of 20564762700 is 726746502.

It is a happy number.

It is a super-2 number, since 2×20564762700² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 563226 + ... + 598625.

It is an arithmetic number, because the mean of its divisors is an integer number (840406280).

Almost surely, 2^20564762700 is an apocalyptic number.

20564762700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20564762700 is an abundant number, since it is smaller than the sum of its proper divisors (39944489460).

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

20564762700 is a wasteful number, since it uses less digits than its factorization.

20564762700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161927 (or 1161920 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 39.

The spelling of 20564762700 in words is "twenty billion, five hundred sixty-four million, seven hundred sixty-two thousand, seven hundred".