18046090 has 8 divisors (see below), whose sum is σ = 32482980. Its totient is φ = 7218432.

The previous prime is 18046081. The next prime is 18046097. The reversal of 18046090 is 9064081.

It can be written as a sum of positive squares in 2 ways, for example, as 15186609 + 2859481 = 3897^2 + 1691^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18046090² = 651322728576200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18046097) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 902295 + ... + 902314.

Almost surely, 2^18046090 is an apocalyptic number.

18046090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18046090 is a deficient number, since it is larger than the sum of its proper divisors (14436890).

18046090 is a wasteful number, since it uses less digits than its factorization.

18046090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804616.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 18046090 is about 4248.0689730747. The cubic root of 18046090 is about 262.2976339038.

Subtracting from 18046090 its reverse (9064081), we obtain a square (8982009 = 2997²).

The spelling of 18046090 in words is "eighteen million, forty-six thousand, ninety".