12091330188 has 48 divisors (see below), whose sum is σ = 35826165760. Its totient is φ = 3454665552.

The previous prime is 12091330187. The next prime is 12091330201. The reversal of 12091330188 is 88103319021.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (12091330187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7996156 + ... + 7997667.

Almost surely, 2^12091330188 is an apocalyptic number.

12091330188 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12091330188 is an abundant number, since it is smaller than the sum of its proper divisors (23734835572).

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

12091330188 is a wasteful number, since it uses less digits than its factorization.

12091330188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15993843 (or 15993835 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 12091330188 in words is "twelve billion, ninety-one million, three hundred thirty thousand, one hundred eighty-eight".