22918212 has 72 divisors (see below), whose sum is σ = 61326720. Its totient is φ = 7201920.

The previous prime is 22918177. The next prime is 22918219. The reversal of 22918212 is 21281922.

It is not an unprimeable number, because it can be changed into a prime (22918219) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73537 + ... + 73847.

It is an arithmetic number, because the mean of its divisors is an integer number (851760).

Almost surely, 2^22918212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22918212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30663360).

22918212 is an abundant number, since it is smaller than the sum of its proper divisors (38408508).

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

22918212 is a wasteful number, since it uses less digits than its factorization.

22918212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 428 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 22918212 is about 4787.2969408634. The cubic root of 22918212 is about 284.0492045936.

The spelling of 22918212 in words is "twenty-two million, nine hundred eighteen thousand, two hundred twelve".