18122186 has 8 divisors (see below), whose sum is σ = 27219780. Its totient is φ = 9048928.

The previous prime is 18122179. The next prime is 18122191. The reversal of 18122186 is 68122181.

It can be written as a sum of positive squares in 2 ways, for example, as 18105025 + 17161 = 4255^2 + 131^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4091 + ... + 7278.

Almost surely, 2^18122186 is an apocalyptic number.

18122186 is a deficient number, since it is larger than the sum of its proper divisors (9097594).

18122186 is a wasteful number, since it uses less digits than its factorization.

18122186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12168.

The product of its digits is 1536, while the sum is 29.

The square root of 18122186 is about 4257.0160911136. The cubic root of 18122186 is about 262.6657988096.

The spelling of 18122186 in words is "eighteen million, one hundred twenty-two thousand, one hundred eighty-six".