12843991372 has 24 divisors (see below), whose sum is σ = 22755571776. Its totient is φ = 6342452688.

The previous prime is 12843991357. The next prime is 12843991379. The reversal of 12843991372 is 27319934821.

It is a happy number.

It is a super-2 number, since 2×12843991372² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12843991379) 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 7 ways as a sum of consecutive naturals, for example, 1444083 + ... + 1452949.

It is an arithmetic number, because the mean of its divisors is an integer number (948148824).

Almost surely, 2^12843991372 is an apocalyptic number.

It is an amenable number.

12843991372 is a deficient number, since it is larger than the sum of its proper divisors (9911580404).

12843991372 is a wasteful number, since it uses less digits than its factorization.

12843991372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13317 (or 13315 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The spelling of 12843991372 in words is "twelve billion, eight hundred forty-three million, nine hundred ninety-one thousand, three hundred seventy-two".