18108223 has 8 divisors (see below), whose sum is σ = 20828192. Its totient is φ = 15421536.

The previous prime is 18108217. The next prime is 18108227. The reversal of 18108223 is 32280181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18108223 - 2¹⁷ = 17977151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18108227) 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, 7140 + ... + 9337.

It is an arithmetic number, because the mean of its divisors is an integer number (2603524).

Almost surely, 2^18108223 is an apocalyptic number.

18108223 is a deficient number, since it is larger than the sum of its proper divisors (2719969).

18108223 is a wasteful number, since it uses less digits than its factorization.

18108223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16641.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18108223 is about 4255.3757765913. The cubic root of 18108223 is about 262.5983208407.

It can be divided in two parts, 18 and 108223, that added together give a square (108241 = 329²).

The spelling of 18108223 in words is "eighteen million, one hundred eight thousand, two hundred twenty-three".