18108224 has 56 divisors (see below), whose sum is σ = 37722048. Its totient is φ = 8616960.

The previous prime is 18108217. The next prime is 18108227. The reversal of 18108224 is 42280181.

It is a junction number, because it is equal to n+sod(n) for n = 18108193 and 18108202.

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, 175757 + ... + 175859.

It is an arithmetic number, because the mean of its divisors is an integer number (673608).

Almost surely, 2^18108224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18108224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18861024).

18108224 is an abundant number, since it is smaller than the sum of its proper divisors (19613824).

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

18108224 is a wasteful number, since it uses less digits than its factorization.

18108224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 18108224 is about 4255.3758940897. The cubic root of 18108224 is about 262.5983256746.

The spelling of 18108224 in words is "eighteen million, one hundred eight thousand, two hundred twenty-four".