18338166 has 96 divisors (see below), whose sum is σ = 50409216. Its totient is φ = 4680000.

The previous prime is 18338161. The next prime is 18338209. The reversal of 18338166 is 66183381.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18338166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18338161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 139921 + ... + 140051.

It is an arithmetic number, because the mean of its divisors is an integer number (525096).

Almost surely, 2^18338166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18338166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25204608).

18338166 is an abundant number, since it is smaller than the sum of its proper divisors (32071050).

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

18338166 is a wasteful number, since it uses less digits than its factorization.

18338166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 255 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 18338166 is about 4282.3084895883. The cubic root of 18338166 is about 263.7051632715.

It can be divided in two parts, 1833 and 8166, that added together give a palindrome (9999).

The spelling of 18338166 in words is "eighteen million, three hundred thirty-eight thousand, one hundred sixty-six".