22604509 has 16 divisors (see below), whose sum is σ = 25747200. Its totient is φ = 19713024.

The previous prime is 22604501. The next prime is 22604513. The reversal of 22604509 is 90540622.

It is a cyclic number.

It is not a de Polignac number, because 22604509 - 2³ = 22604501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22604501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14437 + ... + 15925.

It is an arithmetic number, because the mean of its divisors is an integer number (1609200).

Almost surely, 2^22604509 is an apocalyptic number.

It is an amenable number.

22604509 is a deficient number, since it is larger than the sum of its proper divisors (3142691).

22604509 is a wasteful number, since it uses less digits than its factorization.

22604509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 22604509 is about 4754.4199435893. The cubic root of 22604509 is about 282.7472302538.

The spelling of 22604509 in words is "twenty-two million, six hundred four thousand, five hundred nine".