Frequency, draw history and statistical context for the number 21 across all historical Powerball draws.
Across 1,937 historical Powerball draws, the number 21 has appeared 164 times — that's 8.47% of all draws. That's 17% above the expected rate for a uniformly random draw, putting it firmly in the hot bucket.
Number 21 was last drawn 9 draws ago. Whether that makes it "due" is a long-running debate among lottery players — the mathematical answer is that lottery draws are independent events, so a number's history has no influence on the next draw. But the Strategy Lab lets you bias your picks toward or away from overdue numbers if you want to play with that pattern.