18224266 has 4 divisors (see below), whose sum is σ = 27336402. Its totient is φ = 9112132.

The previous prime is 18224243. The next prime is 18224279. The reversal of 18224266 is 66242281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16573041 + 1651225 = 4071^2 + 1285^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4556065 + ... + 4556068.

Almost surely, 2^18224266 is an apocalyptic number.

18224266 is a deficient number, since it is larger than the sum of its proper divisors (9112136).

18224266 is an equidigital number, since it uses as much as digits as its factorization.

18224266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9112135.

The product of its digits is 9216, while the sum is 31.

The square root of 18224266 is about 4268.9888732579. The cubic root of 18224266 is about 263.1580635045.

The spelling of 18224266 in words is "eighteen million, two hundred twenty-four thousand, two hundred sixty-six".