19623728159 has 8 divisors (see below), whose sum is σ = 23150573568. Its totient is φ = 16277746680.

The previous prime is 19623728123. The next prime is 19623728171. The reversal of 19623728159 is 95182732691.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19623728159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19623728159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19623728119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45215747 + ... + 45216180.

It is an arithmetic number, because the mean of its divisors is an integer number (2893821696).

Almost surely, 2^19623728159 is an apocalyptic number.

19623728159 is a deficient number, since it is larger than the sum of its proper divisors (3526845409).

19623728159 is an equidigital number, since it uses as much as digits as its factorization.

19623728159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90431965.

The product of its digits is 1632960, while the sum is 53.

The spelling of 19623728159 in words is "nineteen billion, six hundred twenty-three million, seven hundred twenty-eight thousand, one hundred fifty-nine".