12138944492 has 12 divisors (see below), whose sum is σ = 21560215320. Its totient is φ = 5978882976.

The previous prime is 12138944491. The next prime is 12138944507. The reversal of 12138944492 is 29444983121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12138944491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22647017 + ... + 22647552.

It is an arithmetic number, because the mean of its divisors is an integer number (1796684610).

Almost surely, 2^12138944492 is an apocalyptic number.

It is an amenable number.

12138944492 is a deficient number, since it is larger than the sum of its proper divisors (9421270828).

12138944492 is a wasteful number, since it uses less digits than its factorization.

12138944492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45294640 (or 45294638 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The spelling of 12138944492 in words is "twelve billion, one hundred thirty-eight million, nine hundred forty-four thousand, four hundred ninety-two".