19040868608 has 144 divisors (see below), whose sum is σ = 40689008640. Its totient is φ = 8877926400.

The previous prime is 19040868533. The next prime is 19040868611. The reversal of 19040868608 is 80686804091.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26482073 + ... + 26482791.

It is an arithmetic number, because the mean of its divisors is an integer number (282562560).

Almost surely, 2^19040868608 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 19040868608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20344504320).

19040868608 is an abundant number, since it is smaller than the sum of its proper divisors (21648140032).

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

19040868608 is an equidigital number, since it uses as much as digits as its factorization.

19040868608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884 (or 870 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 50.

The spelling of 19040868608 in words is "nineteen billion, forty million, eight hundred sixty-eight thousand, six hundred eight".