12180981992 has 16 divisors (see below), whose sum is σ = 22884755040. Its totient is φ = 6078380656.

The previous prime is 12180981929. The next prime is 12180982003. The reversal of 12180981992 is 29918908121.

It is a self number, because there is not a number n which added to its sum of digits gives 12180981992.

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, 1509518 + ... + 1517565.

It is an arithmetic number, because the mean of its divisors is an integer number (1430297190).

Almost surely, 2^12180981992 is an apocalyptic number.

It is an amenable number.

12180981992 is a deficient number, since it is larger than the sum of its proper divisors (10703773048).

12180981992 is a wasteful number, since it uses less digits than its factorization.

12180981992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027592 (or 3027588 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 50.

The spelling of 12180981992 in words is "twelve billion, one hundred eighty million, nine hundred eighty-one thousand, nine hundred ninety-two".