19081259189 has 2 divisors, whose sum is σ = 19081259190. Its totient is φ = 19081259188.

The previous prime is 19081259173. The next prime is 19081259191. The reversal of 19081259189 is 98195218091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13045523089 + 6035736100 = 114217^2 + 77690^2 .

It is a cyclic number.

It is not a de Polignac number, because 19081259189 - 2⁴ = 19081259173 is a prime.

Together with 19081259191, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19081259189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19081259689) 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, 9540629594 + 9540629595.

It is an arithmetic number, because the mean of its divisors is an integer number (9540629595).

Almost surely, 2^19081259189 is an apocalyptic number.

It is an amenable number.

19081259189 is a deficient number, since it is larger than the sum of its proper divisors (1).

19081259189 is an equidigital number, since it uses as much as digits as its factorization.

19081259189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 53.

The spelling of 19081259189 in words is "nineteen billion, eighty-one million, two hundred fifty-nine thousand, one hundred eighty-nine".