18380868 has 36 divisors (see below), whose sum is σ = 47145840. Its totient is φ = 5569520.

The previous prime is 18380849. The next prime is 18380881. The reversal of 18380868 is 86808381.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4878 + ... + 7781.

Almost surely, 2^18380868 is an apocalyptic number.

It is an amenable number.

18380868 is an abundant number, since it is smaller than the sum of its proper divisors (28764972).

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

18380868 is a wasteful number, since it uses less digits than its factorization.

18380868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12688 (or 12675 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 18380868 is about 4287.2914526540. The cubic root of 18380868 is about 263.9096913331.

The spelling of 18380868 in words is "eighteen million, three hundred eighty thousand, eight hundred sixty-eight".