18338668 has 12 divisors (see below), whose sum is σ = 32154192. Its totient is φ = 9151760.

The previous prime is 18338653. The next prime is 18338681. The reversal of 18338668 is 86683381.

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, 1888 + ... + 6343.

It is an arithmetic number, because the mean of its divisors is an integer number (2679516).

Almost surely, 2^18338668 is an apocalyptic number.

It is an amenable number.

18338668 is a deficient number, since it is larger than the sum of its proper divisors (13815524).

18338668 is a wasteful number, since it uses less digits than its factorization.

18338668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8792 (or 8790 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 18338668 is about 4282.3671024330. The cubic root of 18338668 is about 263.7075695241.

It can be divided in two parts, 1833 and 8668, that added together give a palindrome (10501).

The spelling of 18338668 in words is "eighteen million, three hundred thirty-eight thousand, six hundred sixty-eight".