19980063800856 has 48 divisors (see below), whose sum is σ = 54112919897400. Its totient is φ = 6659990854272.

The previous prime is 19980063800803. The next prime is 19980063800857. The reversal of 19980063800856 is 65800836008991.

It is a junction number, because it is equal to n+sod(n) for n = 19980063800793 and 19980063800802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19980063800857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19777980 + ... + 20763636.

Almost surely, 2^{19980063800856} is an apocalyptic number.

It is an amenable number.

19980063800856 is an abundant number, since it is smaller than the sum of its proper divisors (34132856096544).

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

19980063800856 is a wasteful number, since it uses less digits than its factorization.

19980063800856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267208 (or 1267201 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 19980063800856 in words is "nineteen trillion, nine hundred eighty billion, sixty-three million, eight hundred thousand, eight hundred fifty-six".