20316808 has 16 divisors (see below), whose sum is σ = 38813580. Its totient is φ = 9966528.

The previous prime is 20316799. The next prime is 20316817. The reversal of 20316808 is 80861302.

It is an interprime number because it is at equal distance from previous prime (20316799) and next prime (20316817).

It can be written as a sum of positive squares in 2 ways, for example, as 20088324 + 228484 = 4482^2 + 478^2 .

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, 23535 + ... + 24382.

Almost surely, 2^20316808 is an apocalyptic number.

It is an amenable number.

20316808 is a deficient number, since it is larger than the sum of its proper divisors (18496772).

20316808 is a wasteful number, since it uses less digits than its factorization.

20316808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47976 (or 47972 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20316808 is about 4507.4169986812. The cubic root of 20316808 is about 272.8675085117.

The spelling of 20316808 in words is "twenty million, three hundred sixteen thousand, eight hundred eight".