18272166 has 32 divisors (see below), whose sum is σ = 41603328. Its totient is φ = 5295840.

The previous prime is 18272159. The next prime is 18272179. The reversal of 18272166 is 66127281.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4501 + ... + 7536.

It is an arithmetic number, because the mean of its divisors is an integer number (1300104).

Almost surely, 2^18272166 is an apocalyptic number.

18272166 is an abundant number, since it is smaller than the sum of its proper divisors (23331162).

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

18272166 is a wasteful number, since it uses less digits than its factorization.

18272166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12076.

The product of its digits is 8064, while the sum is 33.

The square root of 18272166 is about 4274.5954194520. The cubic root of 18272166 is about 263.3884201728.

It can be divided in two parts, 1827 and 2166, that added together give a palindrome (3993).

The spelling of 18272166 in words is "eighteen million, two hundred seventy-two thousand, one hundred sixty-six".