18338882717 has 2 divisors, whose sum is σ = 18338882718. Its totient is φ = 18338882716.

The previous prime is 18338882659. The next prime is 18338882741. The reversal of 18338882717 is 71728883381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13787221561 + 4551661156 = 117419^2 + 67466^2 .

It is a cyclic number.

It is not a de Polignac number, because 18338882717 - 2²⁸ = 18070447261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18338882747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9169441358 + 9169441359.

It is an arithmetic number, because the mean of its divisors is an integer number (9169441359).

Almost surely, 2^18338882717 is an apocalyptic number.

It is an amenable number.

18338882717 is a deficient number, since it is larger than the sum of its proper divisors (1).

18338882717 is an equidigital number, since it uses as much as digits as its factorization.

18338882717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3612672, while the sum is 56.

The spelling of 18338882717 in words is "eighteen billion, three hundred thirty-eight million, eight hundred eighty-two thousand, seven hundred seventeen".