Unfortunately, your post does not show the 20 x 20 matrix. I have constructed a 20 x 20 matrix reading your data from left to right thus:
From a simple spreadsheet, it can be determined that the greatest number resulting from the product of any consecutive 4 numbers either vertically or horizontally without wrapping columns or rows is 51,267,216. The smallest number is of course 0. The median number is 1,944,852, and the average is 4,256,955 (rounded). There are 578 computations, and the sum of those computations is 2,460,519,837.
Hope this helps.
