18313808 has 20 divisors (see below), whose sum is σ = 36628608. Its totient is φ = 8861280.

The previous prime is 18313787. The next prime is 18313837. The reversal of 18313808 is 80831381.

18313808 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17966 + ... + 18957.

Almost surely, 2^18313808 is an apocalyptic number.

It is an amenable number.

18313808 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18313808 is a wasteful number, since it uses less digits than its factorization.

18313808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36962 (or 36956 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 18313808 is about 4279.4635177788. The cubic root of 18313808 is about 263.5883544907.

The spelling of 18313808 in words is "eighteen million, three hundred thirteen thousand, eight hundred eight".