12181928916 has 24 divisors (see below), whose sum is σ = 28427313600. Its totient is φ = 4060241152.

The previous prime is 12181928903. The next prime is 12181928923. The reversal of 12181928916 is 61982918121.

It is a happy number.

It is a super-2 number, since 2×12181928916² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 92260 + ... + 181316.

It is an arithmetic number, because the mean of its divisors is an integer number (1184471400).

Almost surely, 2^12181928916 is an apocalyptic number.

It is an amenable number.

12181928916 is an abundant number, since it is smaller than the sum of its proper divisors (16245384684).

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

12181928916 is a wasteful number, since it uses less digits than its factorization.

12181928916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100463 (or 100461 counting only the distinct ones).

The product of its digits is 124416, while the sum is 48.

The spelling of 12181928916 in words is "twelve billion, one hundred eighty-one million, nine hundred twenty-eight thousand, nine hundred sixteen".