19857355596 has 72 divisors (see below), whose sum is σ = 54209719200. Its totient is φ = 6092596224.

The previous prime is 19857355517. The next prime is 19857355603. The reversal of 19857355596 is 69555375891.

19857355596 is a `hidden beast` number, since 1 + 9 + 8 + 5 + 7 + 35 + 5 + 596 = 666.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 105105 + ... + 225303.

Almost surely, 2^19857355596 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 19857355596, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27104859600).

19857355596 is an abundant number, since it is smaller than the sum of its proper divisors (34352363604).

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

19857355596 is a wasteful number, since it uses less digits than its factorization.

19857355596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120575 (or 120570 counting only the distinct ones).

The product of its digits is 51030000, while the sum is 63.

The spelling of 19857355596 in words is "nineteen billion, eight hundred fifty-seven million, three hundred fifty-five thousand, five hundred ninety-six".