19719034168 has 16 divisors (see below), whose sum is σ = 36979516080. Its totient is φ = 9857829888.

The previous prime is 19719034163. The next prime is 19719034177. The reversal of 19719034168 is 86143091791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19719034163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160521 + ... + 255352.

It is an arithmetic number, because the mean of its divisors is an integer number (2311219755).

Almost surely, 2^19719034168 is an apocalyptic number.

It is an amenable number.

19719034168 is a deficient number, since it is larger than the sum of its proper divisors (17260481912).

19719034168 is a wasteful number, since it uses less digits than its factorization.

19719034168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421806 (or 421802 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 19719034168 in words is "nineteen billion, seven hundred nineteen million, thirty-four thousand, one hundred sixty-eight".