18406568 has 16 divisors (see below), whose sum is σ = 34836480. Its totient is φ = 9116848.

The previous prime is 18406547. The next prime is 18406571. The reversal of 18406568 is 86560481.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9896 + ... + 11607.

It is an arithmetic number, because the mean of its divisors is an integer number (2177280).

Almost surely, 2^18406568 is an apocalyptic number.

It is an amenable number.

18406568 is a deficient number, since it is larger than the sum of its proper divisors (16429912).

18406568 is a wasteful number, since it uses less digits than its factorization.

18406568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21616 (or 21612 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 18406568 is about 4290.2876360449. The cubic root of 18406568 is about 264.0326329419.

The spelling of 18406568 in words is "eighteen million, four hundred six thousand, five hundred sixty-eight".