18396598313 has 2 divisors, whose sum is σ = 18396598314. Its totient is φ = 18396598312.

The previous prime is 18396598289. The next prime is 18396598321. The reversal of 18396598313 is 31389569381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9675279769 + 8721318544 = 98363^2 + 93388^2 .

It is a cyclic number.

It is not a de Polignac number, because 18396598313 - 2³⁰ = 17322856489 is a prime.

It is not a weakly prime, because it can be changed into another prime (18396598343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9198299156 + 9198299157.

It is an arithmetic number, because the mean of its divisors is an integer number (9198299157).

Almost surely, 2^18396598313 is an apocalyptic number.

It is an amenable number.

18396598313 is a deficient number, since it is larger than the sum of its proper divisors (1).

18396598313 is an equidigital number, since it uses as much as digits as its factorization.

18396598313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 56.

The spelling of 18396598313 in words is "eighteen billion, three hundred ninety-six million, five hundred ninety-eight thousand, three hundred thirteen".