18006864 has 40 divisors (see below), whose sum is σ = 47779680. Its totient is φ = 5839488.

The previous prime is 18006839. The next prime is 18006881. The reversal of 18006864 is 46860081.

It is a super-2 number, since 2×18006864² = 648494302228992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3294 + ... + 6845.

It is an arithmetic number, because the mean of its divisors is an integer number (1194492).

Almost surely, 2^18006864 is an apocalyptic number.

It is an amenable number.

18006864 is an abundant number, since it is smaller than the sum of its proper divisors (29772816).

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

18006864 is a wasteful number, since it uses less digits than its factorization.

18006864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10187 (or 10181 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 18006864 is about 4243.4495401737. The cubic root of 18006864 is about 262.1074477224.

The spelling of 18006864 in words is "eighteen million, six thousand, eight hundred sixty-four".