18423224 has 16 divisors (see below), whose sum is σ = 35196120. Its totient is φ = 9037600.

The previous prime is 18423211. The next prime is 18423241. The reversal of 18423224 is 42232481.

It is a junction number, because it is equal to n+sod(n) for n = 18423193 and 18423202.

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, 21302 + ... + 22149.

Almost surely, 2^18423224 is an apocalyptic number.

It is an amenable number.

18423224 is a deficient number, since it is larger than the sum of its proper divisors (16772896).

18423224 is a wasteful number, since it uses less digits than its factorization.

18423224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43510 (or 43506 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

The square root of 18423224 is about 4292.2283257068. The cubic root of 18423224 is about 264.1122494807.

The spelling of 18423224 in words is "eighteen million, four hundred twenty-three thousand, two hundred twenty-four".