19109800189 has 2 divisors, whose sum is σ = 19109800190. Its totient is φ = 19109800188.

The previous prime is 19109800117. The next prime is 19109800207. The reversal of 19109800189 is 98100890191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18901575289 + 208224900 = 137483^2 + 14430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19109800189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19109803189) 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, 9554900094 + 9554900095.

It is an arithmetic number, because the mean of its divisors is an integer number (9554900095).

Almost surely, 2^19109800189 is an apocalyptic number.

It is an amenable number.

19109800189 is a deficient number, since it is larger than the sum of its proper divisors (1).

19109800189 is an equidigital number, since it uses as much as digits as its factorization.

19109800189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 46.

The spelling of 19109800189 in words is "nineteen billion, one hundred nine million, eight hundred thousand, one hundred eighty-nine".