12081919218 has 16 divisors (see below), whose sum is σ = 24193067040. Its totient is φ = 4022434976.

The previous prime is 12081919163. The next prime is 12081919243. The reversal of 12081919218 is 81291918021.

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 12081919218.

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, 1212483 + ... + 1222406.

It is an arithmetic number, because the mean of its divisors is an integer number (1512066690).

Almost surely, 2^12081919218 is an apocalyptic number.

12081919218 is an abundant number, since it is smaller than the sum of its proper divisors (12111147822).

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

12081919218 is a wasteful number, since it uses less digits than its factorization.

12081919218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2435721.

The product of its (nonzero) digits is 20736, while the sum is 42.

The spelling of 12081919218 in words is "twelve billion, eighty-one million, nine hundred nineteen thousand, two hundred eighteen".