At the bris between the parts Hashem told Avraham to bring three heifers, three goats, three rams, a turtledove, and a young dove as a sacrifice. He cut the animals in half, but he did not cut the birds in half [Bereishis 15: 9-10].
Question: How many total animal parts did he have?
Answer: 9 animals cut in ½ = 18
2 birds = 2
Total 20 parts