18204799189 has 4 divisors (see below), whose sum is σ = 18628166656. Its totient is φ = 17781431724.

The previous prime is 18204799141. The next prime is 18204799201. The reversal of 18204799189 is 98199740281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18204799189 - 2¹¹ = 18204797141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18204799139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211683669 + ... + 211683754.

It is an arithmetic number, because the mean of its divisors is an integer number (4657041664).

Almost surely, 2^18204799189 is an apocalyptic number.

It is an amenable number.

18204799189 is a deficient number, since it is larger than the sum of its proper divisors (423367467).

18204799189 is an equidigital number, since it uses as much as digits as its factorization.

18204799189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423367466.

The product of its (nonzero) digits is 2612736, while the sum is 58.

The spelling of 18204799189 in words is "eighteen billion, two hundred four million, seven hundred ninety-nine thousand, one hundred eighty-nine".