In PowerBall under the 5/50 + 1/20 · since Jun 2018 rules — 867 draws, 1 from 1–20.
31times drawn · chance expected 43 −1.92σ
50draws waiting · a wait this long: 8% for any number
26.1average wait between appearances · chance says 20.0
146longest completed wait · 2% chance of one at least that long
20 is drawn as often as chance explains
Drawn 31 times in 867 draws against 43.4 expected, −1.92σ. Each draw is independent: after 50 draws away it is exactly as likely tonight as a number drawn yesterday.
20
Number 20, draw by draw
Drawn 31 times in 867 draws · average wait 26.1 draws · longest completed wait 146 · waiting 50 draws now
a completed wait — darker is longer the wait still running — a lower bound, not a finished gap
Where it lands in a sorted draw
Sort a draw and 20 has a favourite seat — chance gives a large number the high positions more often. That is the shape of sorting, not of the machine.
Never drawn alongside 19 of the other 19 numbers; chance expects about 19 such strangers by now. Every pair →
How many people play it
Under the crowd model, 20 is picked about 1.28× as often as an indifferent choice — 13th most popular of 20. That changes nothing about whether it comes up, and everything about how many ways a jackpot on it would be shared.
Nothing here predicts the next draw. A number’s history is a record of a fair machine’s past, and the machine keeps none of it: 20 is drawn with probability 1/20 tonight whatever it did last week.
PowerBall number 20 (star deck) — how often, how long a wait, and with whom — LotteryOracle