19855041472 has 168 divisors, whose sum is σ = 49451172624. Its totient is φ = 7856529408.

The previous prime is 19855041389. The next prime is 19855041499. The reversal of 19855041472 is 27414055891.

It is a congruent number.

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, 2822023 + ... + 2829049.

It is an arithmetic number, because the mean of its divisors is an integer number (294352218).

Almost surely, 2^19855041472 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 19855041472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24725586312).

19855041472 is an abundant number, since it is smaller than the sum of its proper divisors (29596131152).

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

19855041472 is a wasteful number, since it uses less digits than its factorization.

19855041472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7123 (or 7106 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 19855041472 in words is "nineteen billion, eight hundred fifty-five million, forty-one thousand, four hundred seventy-two".