18945224 has 8 divisors (see below), whose sum is σ = 35522310. Its totient is φ = 9472608.

The previous prime is 18945217. The next prime is 18945233. The reversal of 18945224 is 42254981.

It can be written as a sum of positive squares in only one way, i.e., 14577124 + 4368100 = 3818^2 + 2090^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1184069 + ... + 1184084.

Almost surely, 2^18945224 is an apocalyptic number.

It is an amenable number.

18945224 is a deficient number, since it is larger than the sum of its proper divisors (16577086).

18945224 is a wasteful number, since it uses less digits than its factorization.

18945224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2368159 (or 2368155 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 18945224 is about 4352.6111703206. The cubic root of 18945224 is about 266.5834893362.

The spelling of 18945224 in words is "eighteen million, nine hundred forty-five thousand, two hundred twenty-four".