19117083911 has 4 divisors (see below), whose sum is σ = 19120328352. Its totient is φ = 19113839472.

The previous prime is 19117083907. The next prime is 19117083917. The reversal of 19117083911 is 11938071191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11938071191 = 311 ⋅38386081.

It is a cyclic number.

It is not a de Polignac number, because 19117083911 - 2² = 19117083907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19117083917) 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, 1613366 + ... + 1625171.

It is an arithmetic number, because the mean of its divisors is an integer number (4780082088).

Almost surely, 2^19117083911 is an apocalyptic number.

19117083911 is a deficient number, since it is larger than the sum of its proper divisors (3244441).

19117083911 is an equidigital number, since it uses as much as digits as its factorization.

19117083911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244440.

The product of its (nonzero) digits is 13608, while the sum is 41.

The spelling of 19117083911 in words is "nineteen billion, one hundred seventeen million, eighty-three thousand, nine hundred eleven".