188426428218 has 96 divisors (see below), whose sum is σ = 498238940160. Its totient is φ = 50302909440.

The previous prime is 188426428193. The next prime is 188426428243. The reversal of 188426428218 is 812824624881.

It is a happy number.

188426428218 is a `hidden beast` number, since 18 + 84 + 264 + 282 + 18 = 666.

It is an interprime number because it is at equal distance from previous prime (188426428193) and next prime (188426428243).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 718455 + ... + 945002.

It is an arithmetic number, because the mean of its divisors is an integer number (5189988960).

Almost surely, 2^188426428218 is an apocalyptic number.

188426428218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

188426428218 is an abundant number, since it is smaller than the sum of its proper divisors (309812511942).

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

188426428218 is a wasteful number, since it uses less digits than its factorization.

188426428218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663532 (or 1663529 counting only the distinct ones).

The product of its digits is 3145728, while the sum is 54.

The spelling of 188426428218 in words is "one hundred eighty-eight billion, four hundred twenty-six million, four hundred twenty-eight thousand, two hundred eighteen".