18284218 has 16 divisors (see below), whose sum is σ = 29108160. Its totient is φ = 8595136.

The previous prime is 18284171. The next prime is 18284219. The reversal of 18284218 is 81248281.

It is not an unprimeable number, because it can be changed into a prime (18284219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 655 + ... + 6082.

It is an arithmetic number, because the mean of its divisors is an integer number (1819260).

Almost surely, 2^18284218 is an apocalyptic number.

18284218 is a deficient number, since it is larger than the sum of its proper divisors (10823942).

18284218 is a wasteful number, since it uses less digits than its factorization.

18284218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821.

The product of its digits is 8192, while the sum is 34.

The square root of 18284218 is about 4276.0049111291. The cubic root of 18284218 is about 263.4463162386.

The spelling of 18284218 in words is "eighteen million, two hundred eighty-four thousand, two hundred eighteen".