18038872 has 16 divisors (see below), whose sum is σ = 33870240. Its totient is φ = 9006816.

The previous prime is 18038861. The next prime is 18038897. The reversal of 18038872 is 27883081.

It is a congruent number.

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, 7713 + ... + 9775.

It is an arithmetic number, because the mean of its divisors is an integer number (2116890).

Almost surely, 2^18038872 is an apocalyptic number.

It is an amenable number.

18038872 is a deficient number, since it is larger than the sum of its proper divisors (15831368).

18038872 is a wasteful number, since it uses less digits than its factorization.

18038872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162 (or 3158 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 18038872 is about 4247.2193256294. The cubic root of 18038872 is about 262.2626583348.

The spelling of 18038872 in words is "eighteen million, thirty-eight thousand, eight hundred seventy-two".