20512313872 has 20 divisors (see below), whose sum is σ = 41113043820. Its totient is φ = 9902496128.

The previous prime is 20512313863. The next prime is 20512313929. The reversal of 20512313872 is 27831321502.

It can be written as a sum of positive squares in 2 ways, for example, as 17338568976 + 3173744896 = 131676^2 + 56336^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22103323 + ... + 22104250.

It is an arithmetic number, because the mean of its divisors is an integer number (2055652191).

Almost surely, 2^20512313872 is an apocalyptic number.

It is an amenable number.

20512313872 is an abundant number, since it is smaller than the sum of its proper divisors (20600729948).

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

20512313872 is a wasteful number, since it uses less digits than its factorization.

20512313872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44207610 (or 44207604 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 20512313872 in words is "twenty billion, five hundred twelve million, three hundred thirteen thousand, eight hundred seventy-two".