19168534417 has 4 divisors (see below), whose sum is σ = 19168868916. Its totient is φ = 19168199920.

The previous prime is 19168534403. The next prime is 19168534423. The reversal of 19168534417 is 71443586191.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8967332416 + 10201202001 = 94696^2 + 101001^2 .

It is a cyclic number.

It is not a de Polignac number, because 19168534417 - 2³¹ = 17021050769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19168534117) 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 in 3 ways as a sum of consecutive naturals, for example, 57118 + ... + 203959.

It is an arithmetic number, because the mean of its divisors is an integer number (4792217229).

Almost surely, 2^19168534417 is an apocalyptic number.

It is an amenable number.

19168534417 is a deficient number, since it is larger than the sum of its proper divisors (334499).

19168534417 is an equidigital number, since it uses as much as digits as its factorization.

19168534417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334498.

The product of its digits is 725760, while the sum is 49.

The spelling of 19168534417 in words is "nineteen billion, one hundred sixty-eight million, five hundred thirty-four thousand, four hundred seventeen".