18839872 has 28 divisors (see below), whose sum is σ = 37526976. Its totient is φ = 9384320.

The previous prime is 18839867. The next prime is 18839917. The reversal of 18839872 is 27893881.

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, 27243 + ... + 27925.

Almost surely, 2^18839872 is an apocalyptic number.

It is an amenable number.

18839872 is a deficient number, since it is larger than the sum of its proper divisors (18687104).

18839872 is an equidigital number, since it uses as much as digits as its factorization.

18839872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1116 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The square root of 18839872 is about 4340.4921379954. The cubic root of 18839872 is about 266.0884248205.

The spelling of 18839872 in words is "eighteen million, eight hundred thirty-nine thousand, eight hundred seventy-two".