another than nineteen denoting a quantity comprising twenty things or products representing the amount twenty as Arabic numerals
- the cardinal quantity that is the sum of nineteen and something
- denoting a quantity consisting of 20 items or units
20 is a text message rule and radio rule to ask for somebody's location. For instance, somebody may say "What's your 20?", which is another way of saying "in which will you be at?"
Perhaps the most interesting mammal of Brazil is the manati, or sea-cow (Manatus americanus), which inhabits the lower Amazon and sometimes reaches a length of 15 to 20 ft.