20957730080 has 48 divisors (see below), whose sum is σ = 56585874240. Its totient is φ = 7185507072.

The previous prime is 20957730071. The next prime is 20957730107. The reversal of 20957730080 is 8003775902.

It is a super-2 number, since 2×20957730080² (a number of 21 digits) contains 22 as substring.

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, 9355010 + ... + 9357249.

It is an arithmetic number, because the mean of its divisors is an integer number (1178872380).

Almost surely, 2^20957730080 is an apocalyptic number.

20957730080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20957730080 is an abundant number, since it is smaller than the sum of its proper divisors (35628144160).

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

20957730080 is a wasteful number, since it uses less digits than its factorization.

20957730080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18712281 (or 18712273 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 20957730080 in words is "twenty billion, nine hundred fifty-seven million, seven hundred thirty thousand, eighty".