18368816 has 20 divisors (see below), whose sum is σ = 35764824. Its totient is φ = 9139200.

The previous prime is 18368767. The next prime is 18368821. The reversal of 18368816 is 61886381.

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, 656 + ... + 6096.

Almost surely, 2^18368816 is an apocalyptic number.

18368816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18368816 is a deficient number, since it is larger than the sum of its proper divisors (17396008).

18368816 is a wasteful number, since it uses less digits than its factorization.

18368816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5660 (or 5654 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 18368816 is about 4285.8856727636. The cubic root of 18368816 is about 263.8519984643.

The spelling of 18368816 in words is "eighteen million, three hundred sixty-eight thousand, eight hundred sixteen".