20512585956 has 12 divisors (see below), whose sum is σ = 47862700592. Its totient is φ = 6837528648.

The previous prime is 20512585943. The next prime is 20512585957. The reversal of 20512585956 is 65958521502.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20512585957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 854691070 + ... + 854691093.

Almost surely, 2^20512585956 is an apocalyptic number.

It is an amenable number.

20512585956 is an abundant number, since it is smaller than the sum of its proper divisors (27350114636).

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

20512585956 is a wasteful number, since it uses less digits than its factorization.

20512585956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709382170 (or 1709382168 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 48.

The spelling of 20512585956 in words is "twenty billion, five hundred twelve million, five hundred eighty-five thousand, nine hundred fifty-six".