12133856418 has 32 divisors (see below), whose sum is σ = 26425828800. Its totient is φ = 3699614016.

The previous prime is 12133856417. The next prime is 12133856429. The reversal of 12133856418 is 81465833121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12133856418.

It is not an unprimeable number, because it can be changed into a prime (12133856417) 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 15 ways as a sum of consecutive naturals, for example, 1831821 + ... + 1838432.

It is an arithmetic number, because the mean of its divisors is an integer number (825807150).

Almost surely, 2^12133856418 is an apocalyptic number.

12133856418 is an abundant number, since it is smaller than the sum of its proper divisors (14291972382).

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

12133856418 is a wasteful number, since it uses less digits than its factorization.

12133856418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670306.

The product of its digits is 138240, while the sum is 42.

The spelling of 12133856418 in words is "twelve billion, one hundred thirty-three million, eight hundred fifty-six thousand, four hundred eighteen".