12389915318 has 8 divisors (see below), whose sum is σ = 20274406920. Its totient is φ = 5631779680.

The previous prime is 12389915261. The next prime is 12389915327. The reversal of 12389915318 is 81351998321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12389915318² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281588963 + ... + 281589006.

It is an arithmetic number, because the mean of its divisors is an integer number (2534300865).

Almost surely, 2^12389915318 is an apocalyptic number.

12389915318 is a deficient number, since it is larger than the sum of its proper divisors (7884491602).

12389915318 is a wasteful number, since it uses less digits than its factorization.

12389915318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563177982.

The product of its digits is 466560, while the sum is 50.

The spelling of 12389915318 in words is "twelve billion, three hundred eighty-nine million, nine hundred fifteen thousand, three hundred eighteen".