20665034656 has 24 divisors (see below), whose sum is σ = 46496328480. Its totient is φ = 8856443328.

The previous prime is 20665034623. The next prime is 20665034671. The reversal of 20665034656 is 65643056602.

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, 46127086 + ... + 46127533.

It is an arithmetic number, because the mean of its divisors is an integer number (1937347020).

Almost surely, 2^20665034656 is an apocalyptic number.

It is an amenable number.

20665034656 is an abundant number, since it is smaller than the sum of its proper divisors (25831293824).

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

20665034656 is an equidigital number, since it uses as much as digits as its factorization.

20665034656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92254636 (or 92254628 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 20665034656 in words is "twenty billion, six hundred sixty-five million, thirty-four thousand, six hundred fifty-six".