That force is what most people would call the object's "weight".
Wherever the object is, its weight is
(mass) x (acceleration due to local gravity) .
On Earth, the acceleration due to gravity is 9.8 m/s² . (rounded)
The object's weight is (20 kg) x (9.8 m/s²) = 196 newtons .
(about 44.1 pounds)