19944365768 has 32 divisors (see below), whose sum is σ = 37823087160. Its totient is φ = 9858508800.

The previous prime is 19944365719. The next prime is 19944365783. The reversal of 19944365768 is 86756344991.

It can be written as a sum of positive squares in 4 ways, for example, as 19600560004 + 343805764 = 140002^2 + 18542^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19944365768.

It is an unprimeable number.

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, 525446 + ... + 562122.

Almost surely, 2^19944365768 is an apocalyptic number.

It is an amenable number.

19944365768 is a deficient number, since it is larger than the sum of its proper divisors (17878721392).

19944365768 is a wasteful number, since it uses less digits than its factorization.

19944365768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37457 (or 37453 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 62.

The spelling of 19944365768 in words is "nineteen billion, nine hundred forty-four million, three hundred sixty-five thousand, seven hundred sixty-eight".