20316904 has 64 divisors (see below), whose sum is σ = 42854400. Its totient is φ = 8985600.

The previous prime is 20316893. The next prime is 20316911. The reversal of 20316904 is 40961302.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257137 + ... + 257215.

It is an arithmetic number, because the mean of its divisors is an integer number (669600).

Almost surely, 2^20316904 is an apocalyptic number.

It is an amenable number.

20316904 is an abundant number, since it is smaller than the sum of its proper divisors (22537496).

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

20316904 is a wasteful number, since it uses less digits than its factorization.

20316904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20316904 is about 4507.4276477832. The cubic root of 20316904 is about 272.8679382911.

The spelling of 20316904 in words is "twenty million, three hundred sixteen thousand, nine hundred four".