22518979 has 20 divisors (see below), whose sum is σ = 26822376. Its totient is φ = 18900672.

The previous prime is 22518961. The next prime is 22518983. The reversal of 22518979 is 97981522.

It is not a de Polignac number, because 22518979 - 2⁷ = 22518851 is a prime.

Its product of digits (90720) is a multiple of the sum of its prime factors (224).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22518949) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 199227 + ... + 199339.

Almost surely, 2^22518979 is an apocalyptic number.

22518979 is a deficient number, since it is larger than the sum of its proper divisors (4303397).

22518979 is an frugal number, since it uses more digits than its factorization.

22518979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 203 counting only the distinct ones).

The product of its digits is 90720, while the sum is 43.

The square root of 22518979 is about 4745.4166308134. The cubic root of 22518979 is about 282.3901637908.

The spelling of 22518979 in words is "twenty-two million, five hundred eighteen thousand, nine hundred seventy-nine".