18036490 has 36 divisors (see below), whose sum is σ = 34929846. Its totient is φ = 6704256.

The previous prime is 18036457. The next prime is 18036509. The reversal of 18036490 is 9463081.

It can be written as a sum of positive squares in 3 ways, for example, as 17530969 + 505521 = 4187^2 + 711^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 228271 + ... + 228349.

Almost surely, 2^18036490 is an apocalyptic number.

18036490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18036490 is a deficient number, since it is larger than the sum of its proper divisors (16893356).

18036490 is an equidigital number, since it uses as much as digits as its factorization.

18036490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 18036490 is about 4246.9388976061. The cubic root of 18036490 is about 262.2511140588.

The spelling of 18036490 in words is "eighteen million, thirty-six thousand, four hundred ninety".