18838904 has 32 divisors (see below), whose sum is σ = 40525920. Its totient is φ = 8042496.

The previous prime is 18838889. The next prime is 18838921. The reversal of 18838904 is 40983881.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19292 + ... + 20244.

It is an arithmetic number, because the mean of its divisors is an integer number (1266435).

Almost surely, 2^18838904 is an apocalyptic number.

18838904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18838904 is an abundant number, since it is smaller than the sum of its proper divisors (21687016).

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

18838904 is a wasteful number, since it uses less digits than its factorization.

18838904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1315 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 18838904 is about 4340.3806284703. The cubic root of 18838904 is about 266.0838674999.

The spelling of 18838904 in words is "eighteen million, eight hundred thirty-eight thousand, nine hundred four".