12731993336 has 16 divisors (see below), whose sum is σ = 24517690440. Its totient is φ = 6193942560.

The previous prime is 12731993303. The next prime is 12731993363. The reversal of 12731993336 is 63339913721.

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, 21506450 + ... + 21507041.

Almost surely, 2^12731993336 is an apocalyptic number.

It is an amenable number.

12731993336 is a deficient number, since it is larger than the sum of its proper divisors (11785697104).

12731993336 is a wasteful number, since it uses less digits than its factorization.

12731993336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43013534 (or 43013530 counting only the distinct ones).

The product of its digits is 551124, while the sum is 47.

The spelling of 12731993336 in words is "twelve billion, seven hundred thirty-one million, nine hundred ninety-three thousand, three hundred thirty-six".