19800375804 has 144 divisors (see below), whose sum is σ = 58154818176. Its totient is φ = 5837832000.

The previous prime is 19800375781. The next prime is 19800375809. The reversal of 19800375804 is 40857300891.

It is a self number, because there is not a number n which added to its sum of digits gives 19800375804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19800375809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 370579 + ... + 420629.

It is an arithmetic number, because the mean of its divisors is an integer number (403852904).

Almost surely, 2^19800375804 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 19800375804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29077409088).

19800375804 is an abundant number, since it is smaller than the sum of its proper divisors (38354442372).

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

19800375804 is a wasteful number, since it uses less digits than its factorization.

19800375804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50118 (or 50104 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 19800375804 in words is "nineteen billion, eight hundred million, three hundred seventy-five thousand, eight hundred four".