12393939432 has 64 divisors (see below), whose sum is σ = 36368334720. Its totient is φ = 3445417728.

The previous prime is 12393939431. The next prime is 12393939443. The reversal of 12393939432 is 23493939321.

It is not an unprimeable number, because it can be changed into a prime (12393939431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 990723 + ... + 1003154.

It is an arithmetic number, because the mean of its divisors is an integer number (568255230).

Almost surely, 2^12393939432 is an apocalyptic number.

12393939432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12393939432 is an abundant number, since it is smaller than the sum of its proper divisors (23974395288).

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

12393939432 is a wasteful number, since it uses less digits than its factorization.

12393939432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993930 (or 1993926 counting only the distinct ones).

The product of its digits is 944784, while the sum is 48.

The spelling of 12393939432 in words is "twelve billion, three hundred ninety-three million, nine hundred thirty-nine thousand, four hundred thirty-two".