20957634 has 24 divisors (see below), whose sum is σ = 48079980. Its totient is φ = 6574848.

The previous prime is 20957621. The next prime is 20957653. The reversal of 20957634 is 43675902.

It can be written as a sum of positive squares in 2 ways, for example, as 20277009 + 680625 = 4503^2 + 825^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33939 + ... + 34550.

Almost surely, 2^20957634 is an apocalyptic number.

20957634 is an abundant number, since it is smaller than the sum of its proper divisors (27122346).

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

20957634 is a wasteful number, since it uses less digits than its factorization.

20957634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68514 (or 68511 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 20957634 is about 4577.9508516366. The cubic root of 20957634 is about 275.7067616509.

The spelling of 20957634 in words is "twenty million, nine hundred fifty-seven thousand, six hundred thirty-four".