18045099 has 10 divisors (see below), whose sum is σ = 26956380. Its totient is φ = 12030012.

The previous prime is 18045067. The next prime is 18045173. The reversal of 18045099 is 99054081.

It is not a de Polignac number, because 18045099 - 2⁵ = 18045067 is a prime.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (18045019) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 111309 + ... + 111470.

It is an arithmetic number, because the mean of its divisors is an integer number (2695638).

Almost surely, 2^18045099 is an apocalyptic number.

18045099 is a deficient number, since it is larger than the sum of its proper divisors (8911281).

18045099 is an equidigital number, since it uses as much as digits as its factorization.

18045099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222791 (or 222782 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 18045099 is about 4247.9523302410. The cubic root of 18045099 is about 262.2928324628.

It can be divided in two parts, 1804 and 5099, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 18045099 in words is "eighteen million, forty-five thousand, ninety-nine".