22918144 has 22 divisors (see below), whose sum is σ = 45815954. Its totient is φ = 11458560.

The previous prime is 22918121. The next prime is 22918151. The reversal of 22918144 is 44181922.

It can be written as a sum of positive squares in only one way, i.e., 20358144 + 2560000 = 4512^2 + 1600^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10167 + ... + 12214.

Almost surely, 2^22918144 is an apocalyptic number.

It is an amenable number.

22918144 is a deficient number, since it is larger than the sum of its proper divisors (22897810).

22918144 is an equidigital number, since it uses as much as digits as its factorization.

22918144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22401 (or 22383 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 22918144 is about 4787.2898387292. The cubic root of 22918144 is about 284.0489236618.

The spelling of 22918144 in words is "twenty-two million, nine hundred eighteen thousand, one hundred forty-four".