18099039 has 16 divisors (see below), whose sum is σ = 29031680. Its totient is φ = 9797760.

The previous prime is 18099013. The next prime is 18099041. The reversal of 18099039 is 93099081.

It is not a de Polignac number, because 18099039 - 2⁵ = 18099007 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18098988 and 18099006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18099049) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 22282 + ... + 23079.

It is an arithmetic number, because the mean of its divisors is an integer number (1814480).

Almost surely, 2^18099039 is an apocalyptic number.

18099039 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18099039 is a deficient number, since it is larger than the sum of its proper divisors (10932641).

18099039 is a wasteful number, since it uses less digits than its factorization.

18099039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45390.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 18099039 is about 4254.2965340935. The cubic root of 18099039 is about 262.5539190827.

The spelling of 18099039 in words is "eighteen million, ninety-nine thousand, thirty-nine".