12186009918 has 24 divisors (see below), whose sum is σ = 26610924288. Its totient is φ = 4030018272.

The previous prime is 12186009859. The next prime is 12186009923. The reversal of 12186009918 is 81990068121.

12186009918 is a `hidden beast` number, since 1 + 21 + 8 + 600 + 9 + 9 + 18 = 666.

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 11 ways as a sum of consecutive naturals, for example, 2663071 + ... + 2667642.

It is an arithmetic number, because the mean of its divisors is an integer number (1108788512).

Almost surely, 2^12186009918 is an apocalyptic number.

12186009918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12186009918 is an abundant number, since it is smaller than the sum of its proper divisors (14424914370).

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

12186009918 is a wasteful number, since it uses less digits than its factorization.

12186009918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5330848 (or 5330845 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The spelling of 12186009918 in words is "twelve billion, one hundred eighty-six million, nine thousand, nine hundred eighteen".