19

Mikkeller has somehow jammed 19 different hop varietals into one beer. Aptly named 19. For the lupulin curious, here is the list with (rounded off) percentages for each of the hops.
Simcoe – 17%
Citra – 15%
Amarillo – 14%
Sorachi Ace – 10
Bravo – 6%
Columbus – 6%
Cluster – 4%
Warrior – 4%
Cascade – 3%
Centennial – 3%
Palisade – 2%
Challenger, Galena, Magnum, Mt. Hood, Tettnanger – 1%
Nugget, Super Galena and Willamette – below 1%