22918149 has 24 divisors (see below), whose sum is σ = 34477560. Its totient is φ = 14652288.

The previous prime is 22918121. The next prime is 22918151. The reversal of 22918149 is 94181922.

It can be written as a sum of positive squares in 4 ways, for example, as 50625 + 22867524 = 225^2 + 4782^2 .

It is not a de Polignac number, because 22918149 - 2⁵ = 22918117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22918349) 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, 72139 + ... + 72455.

It is an arithmetic number, because the mean of its divisors is an integer number (1436565).

Almost surely, 2^22918149 is an apocalyptic number.

22918149 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

22918149 is a deficient number, since it is larger than the sum of its proper divisors (11559411).

22918149 is a wasteful number, since it uses less digits than its factorization.

22918149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 626 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 22918149 is about 4787.2903609453. The cubic root of 22918149 is about 284.0489443186.

It can be divided in two parts, 2291 and 8149, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 22918149 in words is "twenty-two million, nine hundred eighteen thousand, one hundred forty-nine".