18090186 has 16 divisors (see below), whose sum is σ = 37022304. Its totient is φ = 5889744.

The previous prime is 18090181. The next prime is 18090197. The reversal of 18090186 is 68109081.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18090181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34801 + ... + 35316.

It is an arithmetic number, because the mean of its divisors is an integer number (2313894).

Almost surely, 2^18090186 is an apocalyptic number.

18090186 is an abundant number, since it is smaller than the sum of its proper divisors (18932118).

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

18090186 is a wasteful number, since it uses less digits than its factorization.

18090186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70165.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 18090186 is about 4253.2559292852. The cubic root of 18090186 is about 262.5111033852.

The spelling of 18090186 in words is "eighteen million, ninety thousand, one hundred eighty-six".