Question: 20 years old is called?
Answer: A person between 10 and 19 years old is called a denarian. A person between 20 and 29 is called a vicenarian. ... A person between 50 and 59 is called a quinquagenarian. A person between 60 and 69 is called a sexagenarian. A person between 70 and 79 is called a septuagenarian.