22641921 has 12 divisors (see below), whose sum is σ = 33401472. Its totient is φ = 14773176.

The previous prime is 22641907. The next prime is 22641929. The reversal of 22641921 is 12914622.

22641921 is a `hidden beast` number, since 226 + 419 + 21 = 666.

It is not a de Polignac number, because 22641921 - 2⁷ = 22641793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22641929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26341 + ... + 27186.

It is an arithmetic number, because the mean of its divisors is an integer number (2783456).

Almost surely, 2^22641921 is an apocalyptic number.

It is an amenable number.

22641921 is a deficient number, since it is larger than the sum of its proper divisors (10759551).

22641921 is a wasteful number, since it uses less digits than its factorization.

22641921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53580 (or 53577 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 22641921 is about 4758.3527611979. The cubic root of 22641921 is about 282.9031329086.

The spelling of 22641921 in words is "twenty-two million, six hundred forty-one thousand, nine hundred twenty-one".