12315018917 has 4 divisors (see below), whose sum is σ = 12339502560. Its totient is φ = 12290535276.

The previous prime is 12315018871. The next prime is 12315018953. The reversal of 12315018917 is 71981051321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12315018917 - 2²⁰ = 12313970341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12315017917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12241067 + ... + 12242072.

It is an arithmetic number, because the mean of its divisors is an integer number (3084875640).

Almost surely, 2^12315018917 is an apocalyptic number.

It is an amenable number.

12315018917 is a deficient number, since it is larger than the sum of its proper divisors (24483643).

12315018917 is an equidigital number, since it uses as much as digits as its factorization.

12315018917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24483642.

The product of its (nonzero) digits is 15120, while the sum is 38.

The spelling of 12315018917 in words is "twelve billion, three hundred fifteen million, eighteen thousand, nine hundred seventeen".