18226188 has 24 divisors (see below), whose sum is σ = 47253360. Its totient is φ = 6075360.

The previous prime is 18226147. The next prime is 18226199. The reversal of 18226188 is 88162281.

18226188 is a `hidden beast` number, since 18 + 22 + 618 + 8 = 666.

It is a super-2 number, since 2×18226188² = 664387858022688, which contains 22 as substring.

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

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, 84273 + ... + 84488.

It is an arithmetic number, because the mean of its divisors is an integer number (1968890).

Almost surely, 2^18226188 is an apocalyptic number.

18226188 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18226188 is an abundant number, since it is smaller than the sum of its proper divisors (29027172).

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

18226188 is a wasteful number, since it uses less digits than its factorization.

18226188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168774 (or 168766 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 18226188 is about 4269.2139791770. The cubic root of 18226188 is about 263.1673143941.

The spelling of 18226188 in words is "eighteen million, two hundred twenty-six thousand, one hundred eighty-eight".