19128315859 has 4 divisors (see below), whose sum is σ = 19136930560. Its totient is φ = 19119701160.

The previous prime is 19128315851. The next prime is 19128315887. The reversal of 19128315859 is 95851382191.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19128315859 - 2³ = 19128315851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19128315851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4304019 + ... + 4308460.

It is an arithmetic number, because the mean of its divisors is an integer number (4784232640).

Almost surely, 2^19128315859 is an apocalyptic number.

19128315859 is a deficient number, since it is larger than the sum of its proper divisors (8614701).

19128315859 is an equidigital number, since it uses as much as digits as its factorization.

19128315859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8614700.

The product of its digits is 777600, while the sum is 52.

The spelling of 19128315859 in words is "nineteen billion, one hundred twenty-eight million, three hundred fifteen thousand, eight hundred fifty-nine".