20525436512 has 24 divisors (see below), whose sum is σ = 46182232656. Its totient is φ = 8796615552.

The previous prime is 20525436469. The next prime is 20525436521. The reversal of 20525436512 is 21563452502.

It is a super-2 number, since 2×20525436512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45815483 + ... + 45815930.

It is an arithmetic number, because the mean of its divisors is an integer number (1924259694).

Almost surely, 2^20525436512 is an apocalyptic number.

It is an amenable number.

20525436512 is an abundant number, since it is smaller than the sum of its proper divisors (25656796144).

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

20525436512 is an equidigital number, since it uses as much as digits as its factorization.

20525436512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91631430 (or 91631422 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 20525436512 in words is "twenty billion, five hundred twenty-five million, four hundred thirty-six thousand, five hundred twelve".