12947831964 has 48 divisors (see below), whose sum is σ = 33589104640. Its totient is φ = 4313288880.

The previous prime is 12947831947. The next prime is 12947831971. The reversal of 12947831964 is 46913874921.

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 12947831964.

It is a congruent number.

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, 143559 + ... + 215649.

Almost surely, 2^12947831964 is an apocalyptic number.

It is an amenable number.

12947831964 is an abundant number, since it is smaller than the sum of its proper divisors (20641272676).

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

12947831964 is a wasteful number, since it uses less digits than its factorization.

12947831964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73767 (or 73759 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The spelling of 12947831964 in words is "twelve billion, nine hundred forty-seven million, eight hundred thirty-one thousand, nine hundred sixty-four".