20957070336 has 44 divisors (see below), whose sum is σ = 55858241232. Its totient is φ = 6985689088.

The previous prime is 20957070307. The next prime is 20957070353. The reversal of 20957070336 is 63307075902.

It is a happy 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, 3407910 + ... + 3414053.

Almost surely, 2^20957070336 is an apocalyptic number.

It is an amenable number.

20957070336 is an abundant number, since it is smaller than the sum of its proper divisors (34901170896).

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

20957070336 is an equidigital number, since it uses as much as digits as its factorization.

20957070336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821986 (or 6821968 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 42.

The spelling of 20957070336 in words is "twenty billion, nine hundred fifty-seven million, seventy thousand, three hundred thirty-six".