18166224 has 20 divisors (see below), whose sum is σ = 46929536. Its totient is φ = 6055392.

The previous prime is 18166193. The next prime is 18166283. The reversal of 18166224 is 42266181.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 18166191 and 18166200.

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, 189184 + ... + 189279.

Almost surely, 2^18166224 is an apocalyptic number.

It is an amenable number.

18166224 is an abundant number, since it is smaller than the sum of its proper divisors (28763312).

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

18166224 is a wasteful number, since it uses less digits than its factorization.

18166224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378474 (or 378468 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 18166224 is about 4262.1853549558. The cubic root of 18166224 is about 262.8783912520.

The spelling of 18166224 in words is "eighteen million, one hundred sixty-six thousand, two hundred twenty-four".