18893599189 has 2 divisors, whose sum is σ = 18893599190. Its totient is φ = 18893599188.

The previous prime is 18893599177. The next prime is 18893599199. The reversal of 18893599189 is 98199539881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16494264900 + 2399334289 = 128430^2 + 48983^2 .

It is a cyclic number.

It is not a de Polignac number, because 18893599189 - 2⁷ = 18893599061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18893599129) 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 as a sum of consecutive naturals, namely, 9446799594 + 9446799595.

It is an arithmetic number, because the mean of its divisors is an integer number (9446799595).

Almost surely, 2^18893599189 is an apocalyptic number.

It is an amenable number.

18893599189 is a deficient number, since it is larger than the sum of its proper divisors (1).

18893599189 is an equidigital number, since it uses as much as digits as its factorization.

18893599189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50388480, while the sum is 70.

The spelling of 18893599189 in words is "eighteen billion, eight hundred ninety-three million, five hundred ninety-nine thousand, one hundred eighty-nine".