19443744768 has 168 divisors, whose sum is σ = 59324207488. Its totient is φ = 5549064192.

The previous prime is 19443744743. The next prime is 19443744797. The reversal of 19443744768 is 86744734491.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22019655 + ... + 22020537.

Almost surely, 2^19443744768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19443744768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29662103744).

19443744768 is an abundant number, since it is smaller than the sum of its proper divisors (39880462720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19443744768 is an frugal number, since it uses more digits than its factorization.

19443744768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 895 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 57.

The spelling of 19443744768 in words is "nineteen billion, four hundred forty-three million, seven hundred forty-four thousand, seven hundred sixty-eight".