22921393 has 6 divisors (see below), whose sum is σ = 25194722. Its totient is φ = 20837520.

The previous prime is 22921361. The next prime is 22921399. The reversal of 22921393 is 39312922.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22581504 + 339889 = 4752^2 + 583^2 .

It is not a de Polignac number, because 22921393 - 2⁵ = 22921361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22921399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 94596 + ... + 94837.

Almost surely, 2^22921393 is an apocalyptic number.

It is an amenable number.

22921393 is a deficient number, since it is larger than the sum of its proper divisors (2273329).

22921393 is a wasteful number, since it uses less digits than its factorization.

22921393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189455 (or 189444 counting only the distinct ones).

The product of its digits is 5832, while the sum is 31.

The square root of 22921393 is about 4787.6291627485. The cubic root of 22921393 is about 284.0623457979.

The spelling of 22921393 in words is "twenty-two million, nine hundred twenty-one thousand, three hundred ninety-three".