18468224 has 32 divisors (see below), whose sum is σ = 37066800. Its totient is φ = 9165312.

The previous prime is 18468211. The next prime is 18468251. The reversal of 18468224 is 42286481.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19637 + ... + 20555.

Almost surely, 2^18468224 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 18468224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18533400).

18468224 is an abundant number, since it is smaller than the sum of its proper divisors (18598576).

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

18468224 is an equidigital number, since it uses as much as digits as its factorization.

18468224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090 (or 1078 counting only the distinct ones).

The product of its digits is 24576, while the sum is 35.

The square root of 18468224 is about 4297.4671610147. The cubic root of 18468224 is about 264.3271121210.

The spelling of 18468224 in words is "eighteen million, four hundred sixty-eight thousand, two hundred twenty-four".