The 1937 $20 (Coyne-Towers) Bank of Canada Note was printed for the Bank of Canada with a recorded printage of 20,000,000 notes — the 13th-lowest of the 23 notes of the issue in the 1937 canadian banknote series, and 1% of the 1,626,969,500 notes in the whole 1937 issue.
A full collector's note for this issue — survival, strike character, and what to check before buying — is on the writing schedule; the figures above are the permanent record.
Mintage figures: United States Mint (Annual Report of the Director of the Mint), Royal Canadian Mint records, and — for the 1935 banknote issue — Bank of Canada printage records as published in the Charlton Standard Catalogue of Canadian Government Paper Money, cross-checked across independent published references. Specifications: United States Mint coin specifications.