22681189 has 2 divisors, whose sum is σ = 22681190. Its totient is φ = 22681188.

The previous prime is 22681187. The next prime is 22681207. The reversal of 22681189 is 98118622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18748900 + 3932289 = 4330^2 + 1983^2 .

It is a cyclic number.

It is not a de Polignac number, because 22681189 - 2¹ = 22681187 is a prime.

Together with 22681187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22681187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11340594 + 11340595.

It is an arithmetic number, because the mean of its divisors is an integer number (11340595).

Almost surely, 2^22681189 is an apocalyptic number.

It is an amenable number.

22681189 is a deficient number, since it is larger than the sum of its proper divisors (1).

22681189 is an equidigital number, since it uses as much as digits as its factorization.

22681189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 37.

The square root of 22681189 is about 4762.4771915464. The cubic root of 22681189 is about 283.0665852389.

The spelling of 22681189 in words is "twenty-two million, six hundred eighty-one thousand, one hundred eighty-nine".