19409785896 has 64 divisors (see below), whose sum is σ = 50896385280. Its totient is φ = 6161114880.

The previous prime is 19409785891. The next prime is 19409785903. The reversal of 19409785896 is 69858790491.

It is not an unprimeable number, because it can be changed into a prime (19409785891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190795 + ... + 274266.

It is an arithmetic number, because the mean of its divisors is an integer number (795256020).

Almost surely, 2^19409785896 is an apocalyptic number.

It is an amenable number.

19409785896 is an abundant number, since it is smaller than the sum of its proper divisors (31486599384).

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

19409785896 is a wasteful number, since it uses less digits than its factorization.

19409785896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465154 (or 465150 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 66.

The spelling of 19409785896 in words is "nineteen billion, four hundred nine million, seven hundred eighty-five thousand, eight hundred ninety-six".