23218435717 has 2 divisors, whose sum is σ = 23218435718. Its totient is φ = 23218435716.

The previous prime is 23218435679. The next prime is 23218435759. The reversal of 23218435717 is 71753481232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16975223521 + 6243212196 = 130289^2 + 79014^2 .

It is a cyclic number.

It is not a de Polignac number, because 23218435717 - 2⁷ = 23218435589 is a prime.

It is a super-2 number, since 2×23218435717² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23218430717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11609217858 + 11609217859.

It is an arithmetic number, because the mean of its divisors is an integer number (11609217859).

Almost surely, 2^23218435717 is an apocalyptic number.

It is an amenable number.

23218435717 is a deficient number, since it is larger than the sum of its proper divisors (1).

23218435717 is an equidigital number, since it uses as much as digits as its factorization.

23218435717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 43.

The spelling of 23218435717 in words is "twenty-three billion, two hundred eighteen million, four hundred thirty-five thousand, seven hundred seventeen".