22518329 has 2 divisors, whose sum is σ = 22518330. Its totient is φ = 22518328.

The previous prime is 22518281. The next prime is 22518337. The reversal of 22518329 is 92381522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22306729 + 211600 = 4723^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 22518329 - 2⁸ = 22518073 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 22518295 and 22518304.

It is not a weakly prime, because it can be changed into another prime (22518359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11259164 + 11259165.

It is an arithmetic number, because the mean of its divisors is an integer number (11259165).

Almost surely, 2^22518329 is an apocalyptic number.

It is an amenable number.

22518329 is a deficient number, since it is larger than the sum of its proper divisors (1).

22518329 is an equidigital number, since it uses as much as digits as its factorization.

22518329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 22518329 is about 4745.3481431819. The cubic root of 22518329 is about 282.3874467438.

The spelling of 22518329 in words is "twenty-two million, five hundred eighteen thousand, three hundred twenty-nine".