All Even Digits
The even-only club. Odd digits need not apply.
A number of two or more digits where every digit is even (0/2/4/6/8), like 246, 8008 or 462080.
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Each digit has 5 even options, but the leading digit can’t be 0, so k-digit all-even numbers number exactly 4×5^(k-1): 20, 100, 500, 2,500 and 12,500 for two through six digits — 15,620 total, about 1.56% of the range.
The comparison with All Odd Digits is instructive: both give each digit 5 choices, but the all-even leading digit loses one option (0 is banned), costing exactly 3,905 numbers across the site. One constraint, visible directly in the combinatorics.
Six-digit all-even numbers often stack other hits: 888888 is simultaneously a repdigit and contains 888, while “arithmetic even strings” like 24680 are their own visual pleasure.