The thirteen numerals
The thirteen numbers that pair with the twenty signs. Thirteen and twenty share no divisors, and that is why the count runs to two hundred and sixty days.
How this is made
Each entry shows how the number is written — the Mexica system is additive and uses dots only — its Lord of the Day and its twenty days.
Revised 2026-09-17.
How to cite this page
Alma Mexica, «The thirteen numerals», Alma Mexica. Revised 2026-09-17. https://almamexica.org/en/numeral/