19819980216 has 48 divisors (see below), whose sum is σ = 53686465560. Its totient is φ = 6605755200.

The previous prime is 19819980209. The next prime is 19819980227. The reversal of 19819980216 is 61208991891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 698971 + ... + 726773.

Almost surely, 2^19819980216 is an apocalyptic number.

It is an amenable number.

19819980216 is an abundant number, since it is smaller than the sum of its proper divisors (33866485344).

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

19819980216 is a wasteful number, since it uses less digits than its factorization.

19819980216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37716 (or 37709 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 54.

The spelling of 19819980216 in words is "nineteen billion, eight hundred nineteen million, nine hundred eighty thousand, two hundred sixteen".