20700831957 has 32 divisors (see below), whose sum is σ = 29857766400. Its totient is φ = 12681902592.

The previous prime is 20700831941. The next prime is 20700831967. The reversal of 20700831957 is 75913800702.

It is not a de Polignac number, because 20700831957 - 2⁴ = 20700831941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20700831967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11767644 + ... + 11769402.

It is an arithmetic number, because the mean of its divisors is an integer number (933055200).

Almost surely, 2^20700831957 is an apocalyptic number.

It is an amenable number.

20700831957 is a deficient number, since it is larger than the sum of its proper divisors (9156934443).

20700831957 is a wasteful number, since it uses less digits than its factorization.

20700831957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957.

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 20700831957 in words is "twenty billion, seven hundred million, eight hundred thirty-one thousand, nine hundred fifty-seven".