18224090 has 16 divisors (see below), whose sum is σ = 33604200. Its totient is φ = 7111680.

The previous prime is 18224081. The next prime is 18224111. The reversal of 18224090 is 9042281.

It can be written as a sum of positive squares in 4 ways, for example, as 13344409 + 4879681 = 3653^2 + 2209^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21815 + ... + 22634.

Almost surely, 2^18224090 is an apocalyptic number.

18224090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18224090 is a deficient number, since it is larger than the sum of its proper divisors (15380110).

18224090 is a wasteful number, since it uses less digits than its factorization.

18224090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44497.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 18224090 is about 4268.9682594276. The cubic root of 18224090 is about 263.1572163561.

The spelling of 18224090 in words is "eighteen million, two hundred twenty-four thousand, ninety".