18247090 has 16 divisors (see below), whose sum is σ = 33977880. Its totient is φ = 7047040.

The previous prime is 18247067. The next prime is 18247109. The reversal of 18247090 is 9074281.

It can be written as a sum of positive squares in 4 ways, for example, as 15421329 + 2825761 = 3927^2 + 1681^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31171 + ... + 31750.

Almost surely, 2^18247090 is an apocalyptic number.

18247090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18247090 is a deficient number, since it is larger than the sum of its proper divisors (15730790).

18247090 is a wasteful number, since it uses less digits than its factorization.

18247090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62957.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 18247090 is about 4271.6612693424. The cubic root of 18247090 is about 263.2678770529.

The spelling of 18247090 in words is "eighteen million, two hundred forty-seven thousand, ninety".