18044099 has 4 divisors (see below), whose sum is σ = 18428064. Its totient is φ = 17660136.

The previous prime is 18044069. The next prime is 18044107. The reversal of 18044099 is 99044081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99044081 = 97 ⋅1021073.

It is a cyclic number.

It is not a de Polignac number, because 18044099 - 2¹⁶ = 17978563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18044069) 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, 191912 + ... + 192005.

It is an arithmetic number, because the mean of its divisors is an integer number (4607016).

Almost surely, 2^18044099 is an apocalyptic number.

18044099 is a deficient number, since it is larger than the sum of its proper divisors (383965).

18044099 is an equidigital number, since it uses as much as digits as its factorization.

18044099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383964.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 18044099 is about 4247.8346248412. The cubic root of 18044099 is about 262.2879872381.

The spelling of 18044099 in words is "eighteen million, forty-four thousand, ninety-nine".