Who invented the number 20?

The concept of the number 20, like all numbers, was not invented by a single individual but rather developed over time through various counting systems. It has roots in ancient civilizations, such as the Sumerians and Egyptians, who used base-10 and base-20 systems for counting. The numeral system we use today, including the representation of 20, has evolved through contributions from cultures around the world, particularly the Indo-Arabic numeral system.