19896311623 has 8 divisors (see below), whose sum is σ = 20248825520. Its totient is φ = 19544647680.

The previous prime is 19896311581. The next prime is 19896311629. The reversal of 19896311623 is 32611369891.

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-19896311623 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 (19896311629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165165 + ... + 258982.

It is an arithmetic number, because the mean of its divisors is an integer number (2531103190).

Almost surely, 2^19896311623 is an apocalyptic number.

19896311623 is a deficient number, since it is larger than the sum of its proper divisors (352513897).

19896311623 is an equidigital number, since it uses as much as digits as its factorization.

19896311623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424977.

The product of its digits is 419904, while the sum is 49.

The spelling of 19896311623 in words is "nineteen billion, eight hundred ninety-six million, three hundred eleven thousand, six hundred twenty-three".