The exact origin of this 20 billion clip is not widely documented, so it is best understood as a short meme sound that circulates on soundboards and in short-form video rather than as a line from a named film, show or game. Creators reuse it because the number itself is instantly recognisable as an exaggerated total, and the brief vocal delivery fits easily into edits, reactions and commentaries about money, gaming, sports and everyday prices. Its popularity comes from that flexibility, with the same few seconds working as a joke about wealth, power or scale in very different contexts.