18713808 has 40 divisors (see below), whose sum is σ = 53716800. Its totient is φ = 6237792.

The previous prime is 18713791. The next prime is 18713813. The reversal of 18713808 is 80831781.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 7 ways as a sum of consecutive naturals, for example, 21228 + ... + 22091.

It is an arithmetic number, because the mean of its divisors is an integer number (1342920).

Almost surely, 2^18713808 is an apocalyptic number.

18713808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18713808 is an abundant number, since it is smaller than the sum of its proper divisors (35002992).

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

18713808 is a wasteful number, since it uses less digits than its factorization.

18713808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43336 (or 43324 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 18713808 is about 4325.9459081223. The cubic root of 18713808 is about 265.4936000245.

The spelling of 18713808 in words is "eighteen million, seven hundred thirteen thousand, eight hundred eight".