22518864 has 40 divisors (see below), whose sum is σ = 64638720. Its totient is φ = 7506144.

The previous prime is 22518851. The next prime is 22518889. The reversal of 22518864 is 46881522.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 25632 + ... + 26495.

It is an arithmetic number, because the mean of its divisors is an integer number (1615968).

Almost surely, 2^22518864 is an apocalyptic number.

22518864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22518864 is an abundant number, since it is smaller than the sum of its proper divisors (42119856).

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

22518864 is a wasteful number, since it uses less digits than its factorization.

22518864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52144 (or 52132 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 22518864 is about 4745.4045138428. The cubic root of 22518864 is about 282.3896830863.

The spelling of 22518864 in words is "twenty-two million, five hundred eighteen thousand, eight hundred sixty-four".