19928812354880 has 224 divisors, whose sum is σ = 55775444659200. Its totient is φ = 6686566318080.

The previous prime is 19928812354859. The next prime is 19928812355077. The reversal of 19928812354880 is 8845321882991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19928812354880.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109687472 + ... + 109869008.

It is an arithmetic number, because the mean of its divisors is an integer number (248997520800).

Almost surely, 2^{19928812354880} is an apocalyptic number.

19928812354880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19928812354880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27887722329600).

19928812354880 is an abundant number, since it is smaller than the sum of its proper divisors (35846632304320).

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

19928812354880 is a wasteful number, since it uses less digits than its factorization.

19928812354880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183977 (or 183967 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 68.

The spelling of 19928812354880 in words is "nineteen trillion, nine hundred twenty-eight billion, eight hundred twelve million, three hundred fifty-four thousand, eight hundred eighty".