18144186 has 16 divisors (see below), whose sum is σ = 36332064. Its totient is φ = 6040784.

The previous prime is 18144173. The next prime is 18144193. The reversal of 18144186 is 68144181.

It is a super-2 number, since 2×18144186² = 658422971205192, which contains 22 as substring.

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, 6520 + ... + 8876.

It is an arithmetic number, because the mean of its divisors is an integer number (2270754).

Almost surely, 2^18144186 is an apocalyptic number.

18144186 is an abundant number, since it is smaller than the sum of its proper divisors (18187878).

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

18144186 is a wasteful number, since it uses less digits than its factorization.

18144186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3645.

The product of its digits is 6144, while the sum is 33.

The square root of 18144186 is about 4259.5992769273. The cubic root of 18144186 is about 262.7720463075.

The spelling of 18144186 in words is "eighteen million, one hundred forty-four thousand, one hundred eighty-six".