20512640364 has 48 divisors (see below), whose sum is σ = 49024335360. Its totient is φ = 6671931840.

The previous prime is 20512640311. The next prime is 20512640381. The reversal of 20512640364 is 46304621502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516994 + ... + 555254.

It is an arithmetic number, because the mean of its divisors is an integer number (1021340320).

Almost surely, 2^20512640364 is an apocalyptic number.

It is an amenable number.

20512640364 is an abundant number, since it is smaller than the sum of its proper divisors (28511694996).

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

20512640364 is a wasteful number, since it uses less digits than its factorization.

20512640364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39350 (or 39348 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 20512640364 in words is "twenty billion, five hundred twelve million, six hundred forty thousand, three hundred sixty-four".