19855016792 has 16 divisors (see below), whose sum is σ = 40091861040. Its totient is φ = 9163853856.

The previous prime is 19855016773. The next prime is 19855016801. The reversal of 19855016792 is 29761055891.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95456708 + ... + 95456915.

It is an arithmetic number, because the mean of its divisors is an integer number (2505741315).

Almost surely, 2^19855016792 is an apocalyptic number.

It is an amenable number.

19855016792 is an abundant number, since it is smaller than the sum of its proper divisors (20236844248).

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

19855016792 is a wasteful number, since it uses less digits than its factorization.

19855016792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190913642 (or 190913638 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 53.

The spelling of 19855016792 in words is "nineteen billion, eight hundred fifty-five million, sixteen thousand, seven hundred ninety-two".