22918189 has 16 divisors (see below), whose sum is σ = 27482112. Its totient is φ = 18686448.

The previous prime is 22918177. The next prime is 22918219. The reversal of 22918189 is 98181922.

It is a cyclic number.

It is not a de Polignac number, because 22918189 - 2⁵ = 22918157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22918589) 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, 45312 + ... + 45814.

It is an arithmetic number, because the mean of its divisors is an integer number (1717632).

Almost surely, 2^22918189 is an apocalyptic number.

It is an amenable number.

22918189 is a deficient number, since it is larger than the sum of its proper divisors (4563923).

22918189 is a wasteful number, since it uses less digits than its factorization.

22918189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816.

The product of its digits is 20736, while the sum is 40.

The square root of 22918189 is about 4787.2945386721. The cubic root of 22918189 is about 284.0491095726.

The spelling of 22918189 in words is "twenty-two million, nine hundred eighteen thousand, one hundred eighty-nine".