22918589 has 2 divisors, whose sum is σ = 22918590. Its totient is φ = 22918588.

The previous prime is 22918583. The next prime is 22918591. The reversal of 22918589 is 98581922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 2079364 = 4565^2 + 1442^2 .

It is a cyclic number.

It is not a de Polignac number, because 22918589 - 2⁴ = 22918573 is a prime.

Together with 22918591, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22918583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11459294 + 11459295.

It is an arithmetic number, because the mean of its divisors is an integer number (11459295).

Almost surely, 2^22918589 is an apocalyptic number.

It is an amenable number.

22918589 is a deficient number, since it is larger than the sum of its proper divisors (1).

22918589 is an equidigital number, since it uses as much as digits as its factorization.

22918589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 44.

The square root of 22918589 is about 4787.3363157397. The cubic root of 22918589 is about 284.0507621026.

The spelling of 22918589 in words is "twenty-two million, nine hundred eighteen thousand, five hundred eighty-nine".