19944319799 has 8 divisors (see below), whose sum is σ = 20239758000. Its totient is φ = 19650926592.

The previous prime is 19944319789. The next prime is 19944319807. The reversal of 19944319799 is 99791344991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19944319799 - 2⁴ = 19944319783 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 (19944319789) 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 7 ways as a sum of consecutive naturals, for example, 491594 + ... + 530615.

It is an arithmetic number, because the mean of its divisors is an integer number (2529969750).

Almost surely, 2^19944319799 is an apocalyptic number.

19944319799 is a deficient number, since it is larger than the sum of its proper divisors (295438201).

19944319799 is a wasteful number, since it uses less digits than its factorization.

19944319799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022497.

The product of its digits is 19840464, while the sum is 65.

The spelling of 19944319799 in words is "nineteen billion, nine hundred forty-four million, three hundred nineteen thousand, seven hundred ninety-nine".