17889055189 has 2 divisors, whose sum is σ = 17889055190. Its totient is φ = 17889055188.

The previous prime is 17889055187. The next prime is 17889055193. The reversal of 17889055189 is 98155098871.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16960634289 + 928420900 = 130233^2 + 30470^2 .

It is a cyclic number.

It is not a de Polignac number, because 17889055189 - 2¹ = 17889055187 is a prime.

Together with 17889055187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17889055183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8944527594 + 8944527595.

It is an arithmetic number, because the mean of its divisors is an integer number (8944527595).

Almost surely, 2^17889055189 is an apocalyptic number.

It is an amenable number.

17889055189 is a deficient number, since it is larger than the sum of its proper divisors (1).

17889055189 is an equidigital number, since it uses as much as digits as its factorization.

17889055189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7257600, while the sum is 61.

The spelling of 17889055189 in words is "seventeen billion, eight hundred eighty-nine million, fifty-five thousand, one hundred eighty-nine".