20996648000 has 56 divisors (see below), whose sum is σ = 51998218584. Its totient is φ = 8398656000.

The previous prime is 20996647967. The next prime is 20996648009. The reversal of 20996648000 is 84669902.

It can be written as a sum of positive squares in 4 ways, for example, as 131423296 + 20865224704 = 11464^2 + 144448^2 .

It is not an unprimeable number, because it can be changed into a prime (20996648009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1304291 + ... + 1320290.

Almost surely, 2^20996648000 is an apocalyptic number.

20996648000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20996648000 is an abundant number, since it is smaller than the sum of its proper divisors (31001570584).

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

20996648000 is an equidigital number, since it uses as much as digits as its factorization.

20996648000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624608 (or 2624588 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 20996648000 in words is "twenty billion, nine hundred ninety-six million, six hundred forty-eight thousand".