18289668 has 12 divisors (see below), whose sum is σ = 42675920. Its totient is φ = 6096552.

The previous prime is 18289643. The next prime is 18289679. The reversal of 18289668 is 86698281.

It is a tau number, because it is divible by the number of its divisors (12).

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, 762058 + ... + 762081.

Almost surely, 2^18289668 is an apocalyptic number.

It is an amenable number.

18289668 is an abundant number, since it is smaller than the sum of its proper divisors (24386252).

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

18289668 is a wasteful number, since it uses less digits than its factorization.

18289668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524146 (or 1524144 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 18289668 is about 4276.6421407455. The cubic root of 18289668 is about 263.4724888973.

The spelling of 18289668 in words is "eighteen million, two hundred eighty-nine thousand, six hundred sixty-eight".