22518893 has 2 divisors, whose sum is σ = 22518894. Its totient is φ = 22518892.

The previous prime is 22518889. The next prime is 22518917. The reversal of 22518893 is 39881522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21883684 + 635209 = 4678^2 + 797^2 .

It is a cyclic number.

It is not a de Polignac number, because 22518893 - 2² = 22518889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22518823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11259446 + 11259447.

It is an arithmetic number, because the mean of its divisors is an integer number (11259447).

Almost surely, 2^22518893 is an apocalyptic number.

It is an amenable number.

22518893 is a deficient number, since it is larger than the sum of its proper divisors (1).

22518893 is an equidigital number, since it uses as much as digits as its factorization.

22518893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 22518893 is about 4745.4075694296. The cubic root of 22518893 is about 282.3898043076.

The spelling of 22518893 in words is "twenty-two million, five hundred eighteen thousand, eight hundred ninety-three".