Cempohualli
Cempōhualli, cempōalli, cempōaltetl, ompohualnan, ompoalli, ompohualli: 20.

Xōchitl

zompist.com: Numbers in Central Amerindian Languages
 Mesoamerican Calendars See: "TABLE 2. Sign Meanings".
 ancientscripts.com: Aztec (Nahuatl) "...To count items in excess of 20 efficiently, the Aztecs used glyphs for the numbers 20 (a flag), 400 (a feather), and 8000 (a bag of incense)..."

Tlapōhualli