18864318 has 16 divisors (see below), whose sum is σ = 41158656. Its totient is φ = 5716440.

The previous prime is 18864281. The next prime is 18864341. The reversal of 18864318 is 81346881.

It is a Curzon number.

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, 142846 + ... + 142977.

It is an arithmetic number, because the mean of its divisors is an integer number (2572416).

Almost surely, 2^18864318 is an apocalyptic number.

18864318 is an abundant number, since it is smaller than the sum of its proper divisors (22294338).

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

18864318 is a wasteful number, since it uses less digits than its factorization.

18864318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285839.

The product of its digits is 36864, while the sum is 39.

The square root of 18864318 is about 4343.3072652070. The cubic root of 18864318 is about 266.2034642820.

The spelling of 18864318 in words is "eighteen million, eight hundred sixty-four thousand, three hundred eighteen".