18258224 has 10 divisors (see below), whose sum is σ = 35375340. Its totient is φ = 9129104.

The previous prime is 18258217. The next prime is 18258239. The reversal of 18258224 is 42285281.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570554 + ... + 570585.

It is an arithmetic number, because the mean of its divisors is an integer number (3537534).

Almost surely, 2^18258224 is an apocalyptic number.

It is an amenable number.

18258224 is a deficient number, since it is larger than the sum of its proper divisors (17117116).

18258224 is a wasteful number, since it uses less digits than its factorization.

18258224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141147 (or 1141141 counting only the distinct ones).

The product of its digits is 10240, while the sum is 32.

The square root of 18258224 is about 4272.9643106396. The cubic root of 18258224 is about 263.3214130515.

The spelling of 18258224 in words is "eighteen million, two hundred fifty-eight thousand, two hundred twenty-four".