12936867784 has 32 divisors (see below), whose sum is σ = 24443595000. Its totient is φ = 6418662912.

The previous prime is 12936867773. The next prime is 12936867817. The reversal of 12936867784 is 48776863921.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10034028900 + 2902838884 = 100170^2 + 53878^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1340962 + ... + 1350574.

Almost surely, 2^12936867784 is an apocalyptic number.

It is an amenable number.

12936867784 is a deficient number, since it is larger than the sum of its proper divisors (11506727216).

12936867784 is a wasteful number, since it uses less digits than its factorization.

12936867784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10897 (or 10893 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 61.

The spelling of 12936867784 in words is "twelve billion, nine hundred thirty-six million, eight hundred sixty-seven thousand, seven hundred eighty-four".