18056668 has 12 divisors (see below), whose sum is σ = 36113392. Its totient is φ = 7738560.

The previous prime is 18056653. The next prime is 18056677. The reversal of 18056668 is 86665081.

It is a happy number.

18056668 is an admirable number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18056668.

It is a congruent number.

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, 322413 + ... + 322468.

Almost surely, 2^18056668 is an apocalyptic number.

It is an amenable number.

18056668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18056668 is a wasteful number, since it uses less digits than its factorization.

18056668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644892 (or 644890 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 18056668 is about 4249.3138269608. The cubic root of 18056668 is about 262.3488738571.

The spelling of 18056668 in words is "eighteen million, fifty-six thousand, six hundred sixty-eight".