18464864 has 24 divisors (see below), whose sum is σ = 39658248. Its totient is φ = 8392960.

The previous prime is 18464863. The next prime is 18464893. The reversal of 18464864 is 46846481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18464863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25877 + ... + 26580.

It is an arithmetic number, because the mean of its divisors is an integer number (1652427).

Almost surely, 2^18464864 is an apocalyptic number.

It is an amenable number.

18464864 is an abundant number, since it is smaller than the sum of its proper divisors (21193384).

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

18464864 is a wasteful number, since it uses less digits than its factorization.

18464864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52478 (or 52470 counting only the distinct ones).

The product of its digits is 147456, while the sum is 41.

The square root of 18464864 is about 4297.0762152887. The cubic root of 18464864 is about 264.3110811089.

The spelling of 18464864 in words is "eighteen million, four hundred sixty-four thousand, eight hundred sixty-four".