19110830138 has 4 divisors (see below), whose sum is σ = 28666245210. Its totient is φ = 9555415068.

The previous prime is 19110830131. The next prime is 19110830159. The reversal of 19110830138 is 83103801191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83103801191 = 2593 ⋅32049287.

It can be written as a sum of positive squares in only one way, i.e., 13976677729 + 5134152409 = 118223^2 + 71653^2 .

It is a super-3 number, since 3×19110830138³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19110830098 and 19110830107.

It is not an unprimeable number, because it can be changed into a prime (19110830131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4777707533 + ... + 4777707536.

Almost surely, 2^19110830138 is an apocalyptic number.

19110830138 is a deficient number, since it is larger than the sum of its proper divisors (9555415072).

19110830138 is an equidigital number, since it uses as much as digits as its factorization.

19110830138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9555415071.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 19110830138 in words is "nineteen billion, one hundred ten million, eight hundred thirty thousand, one hundred thirty-eight".