18936166 has 4 divisors (see below), whose sum is σ = 28404252. Its totient is φ = 9468082.

The previous prime is 18936161. The next prime is 18936191. The reversal of 18936166 is 66163981.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18936161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4734040 + ... + 4734043.

It is an arithmetic number, because the mean of its divisors is an integer number (7101063).

Almost surely, 2^18936166 is an apocalyptic number.

18936166 is a deficient number, since it is larger than the sum of its proper divisors (9468086).

18936166 is an equidigital number, since it uses as much as digits as its factorization.

18936166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9468085.

The product of its digits is 46656, while the sum is 40.

The square root of 18936166 is about 4351.5705210878. The cubic root of 18936166 is about 266.5409966885.

The spelling of 18936166 in words is "eighteen million, nine hundred thirty-six thousand, one hundred sixty-six".