19115208338 has 18 divisors (see below), whose sum is σ = 29184642261. Its totient is φ = 9389940624.

The previous prime is 19115208311. The next prime is 19115208403. The reversal of 19115208338 is 83380251191.

It can be written as a sum of positive squares in 2 ways, for example, as 18462559129 + 652649209 = 135877^2 + 25547^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=97763.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19115208295 and 19115208304.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 11535206 + ... + 11536862.

Almost surely, 2^19115208338 is an apocalyptic number.

19115208338 is a deficient number, since it is larger than the sum of its proper divisors (10069433923).

19115208338 is an frugal number, since it uses more digits than its factorization.

19115208338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434 (or 1718 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 19115208338 in words is "nineteen billion, one hundred fifteen million, two hundred eight thousand, three hundred thirty-eight".