18534864 has 20 divisors (see below), whose sum is σ = 47881856. Its totient is φ = 6178272.

The previous prime is 18534853. The next prime is 18534881. The reversal of 18534864 is 46843581.

It is a congruent number.

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, 193024 + ... + 193119.

Almost surely, 2^18534864 is an apocalyptic number.

It is an amenable number.

18534864 is an abundant number, since it is smaller than the sum of its proper divisors (29346992).

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

18534864 is a wasteful number, since it uses less digits than its factorization.

18534864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386154 (or 386148 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 18534864 is about 4305.2135835519. The cubic root of 18534864 is about 264.6446596073.

The spelling of 18534864 in words is "eighteen million, five hundred thirty-four thousand, eight hundred sixty-four".