19613331968 has 80 divisors (see below), whose sum is σ = 41848392960. Its totient is φ = 9162854400.

The previous prime is 19613331931. The next prime is 19613331971. The reversal of 19613331968 is 86913331691.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438983 + ... + 481593.

It is an arithmetic number, because the mean of its divisors is an integer number (523104912).

Almost surely, 2^19613331968 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 19613331968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20924196480).

19613331968 is an abundant number, since it is smaller than the sum of its proper divisors (22235060992).

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

19613331968 is an equidigital number, since it uses as much as digits as its factorization.

19613331968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42689 (or 42673 counting only the distinct ones).

The product of its digits is 629856, while the sum is 50.

The spelling of 19613331968 in words is "nineteen billion, six hundred thirteen million, three hundred thirty-one thousand, nine hundred sixty-eight".