19800217573440 has 56 divisors (see below), whose sum is σ = 62865690798720. Its totient is φ = 5280058019328.

The previous prime is 19800217573439. The next prime is 19800217573541. The reversal of 19800217573440 is 4437571200891.

19800217573440 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10312612360 + ... + 10312614279.

Almost surely, 2^{19800217573440} is an apocalyptic number.

19800217573440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19800217573440 is an abundant number, since it is smaller than the sum of its proper divisors (43065473225280).

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

19800217573440 is a wasteful number, since it uses less digits than its factorization.

19800217573440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20625226659 (or 20625226649 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 19800217573440 in words is "nineteen trillion, eight hundred billion, two hundred seventeen million, five hundred seventy-three thousand, four hundred forty".