12318865919 has 2 divisors, whose sum is σ = 12318865920. Its totient is φ = 12318865918.

The previous prime is 12318865831. The next prime is 12318865921. The reversal of 12318865919 is 91956881321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12318865919 - 2²⁸ = 12050430463 is a prime.

It is a super-2 number, since 2×12318865919² (a number of 21 digits) contains 22 as substring.

Together with 12318865921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12318865319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6159432959 + 6159432960.

It is an arithmetic number, because the mean of its divisors is an integer number (6159432960).

Almost surely, 2^12318865919 is an apocalyptic number.

12318865919 is a deficient number, since it is larger than the sum of its proper divisors (1).

12318865919 is an equidigital number, since it uses as much as digits as its factorization.

12318865919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 53.

The spelling of 12318865919 in words is "twelve billion, three hundred eighteen million, eight hundred sixty-five thousand, nine hundred nineteen".