22918117 has 2 divisors, whose sum is σ = 22918118. Its totient is φ = 22918116.

The previous prime is 22918111. The next prime is 22918121. The reversal of 22918117 is 71181922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22905796 + 12321 = 4786^2 + 111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22918117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22918111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11459058 + 11459059.

It is an arithmetic number, because the mean of its divisors is an integer number (11459059).

Almost surely, 2^22918117 is an apocalyptic number.

It is an amenable number.

22918117 is a deficient number, since it is larger than the sum of its proper divisors (1).

22918117 is an equidigital number, since it uses as much as digits as its factorization.

22918117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 31.

The square root of 22918117 is about 4787.2870187613. The cubic root of 22918117 is about 284.0488121152.

The spelling of 22918117 in words is "twenty-two million, nine hundred eighteen thousand, one hundred seventeen".