18239908 has 12 divisors (see below), whose sum is σ = 31998960. Its totient is φ = 9097352.

The previous prime is 18239891. The next prime is 18239917. The reversal of 18239908 is 80993281.

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, 3766 + ... + 7117.

It is an arithmetic number, because the mean of its divisors is an integer number (2666580).

Almost surely, 2^18239908 is an apocalyptic number.

It is an amenable number.

18239908 is a deficient number, since it is larger than the sum of its proper divisors (13759052).

18239908 is a wasteful number, since it uses less digits than its factorization.

18239908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11306 (or 11304 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 18239908 is about 4270.8205300621. The cubic root of 18239908 is about 263.2333320375.

The spelling of 18239908 in words is "eighteen million, two hundred thirty-nine thousand, nine hundred eight".