12518939394 has 32 divisors (see below), whose sum is σ = 29959856640. Its totient is φ = 3851981136.

The previous prime is 12518939387. The next prime is 12518939401. The reversal of 12518939394 is 49393981521.

12518939394 is a `hidden beast` number, since 1 + 2 + 518 + 9 + 39 + 3 + 94 = 666.

It is an interprime number because it is at equal distance from previous prime (12518939387) and next prime (12518939401).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 12518939394.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8915922 + ... + 8917325.

It is an arithmetic number, because the mean of its divisors is an integer number (936245520).

Almost surely, 2^12518939394 is an apocalyptic number.

12518939394 is an abundant number, since it is smaller than the sum of its proper divisors (17440917246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12518939394 is a wasteful number, since it uses less digits than its factorization.

12518939394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17833271 (or 17833265 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The spelling of 12518939394 in words is "twelve billion, five hundred eighteen million, nine hundred thirty-nine thousand, three hundred ninety-four".