Wow, that is incomprehensible.
As are several other things within the article.
"A neutron star is so dense that one teaspoon of its material would have a mass over... (900 times the mass of the Great Pyramid of Giza)"
"In the enormous gravitational field of a neutron star, that teaspoon of material would weigh 1.1×10^25 N (about 15 times what the Moon would weigh if it were placed on the surface of the Earth)"
"The entire mass of the Earth at neutron star density would fit into a sphere of 305m [~3 football fields wide] in diameter."
"Ancient Neutron-Star Crash Made Enough Gold and Uranium to Fill Earth's Oceans"
This last one of course is somewhat less certain than the others, but is probably not off by too much.