18231968 has 24 divisors (see below), whose sum is σ = 37054080. Its totient is φ = 8821440.

The previous prime is 18231943. The next prime is 18231977. The reversal of 18231968 is 86913281.

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, 8198 + ... + 10181.

It is an arithmetic number, because the mean of its divisors is an integer number (1543920).

Almost surely, 2^18231968 is an apocalyptic number.

It is an amenable number.

18231968 is an abundant number, since it is smaller than the sum of its proper divisors (18822112).

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

18231968 is a wasteful number, since it uses less digits than its factorization.

18231968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18420 (or 18412 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 18231968 is about 4269.8908651159. The cubic root of 18231968 is about 263.1951305289.

The spelling of 18231968 in words is "eighteen million, two hundred thirty-one thousand, nine hundred sixty-eight".