20331568512 has 64 divisors (see below), whose sum is σ = 60006375600. Its totient is φ = 6777188352.

The previous prime is 20331568493. The next prime is 20331568529. The reversal of 20331568512 is 21586513302.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2938033 + ... + 2944944.

Almost surely, 2^20331568512 is an apocalyptic number.

It is an amenable number.

20331568512 is an abundant number, since it is smaller than the sum of its proper divisors (39674807088).

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

20331568512 is an equidigital number, since it uses as much as digits as its factorization.

20331568512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5883000 (or 5882982 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 20331568512 in words is "twenty billion, three hundred thirty-one million, five hundred sixty-eight thousand, five hundred twelve".