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ha
97 other languages
21 (alƙalami)
← 20
21
22 →
←
20
21
22
23
24
25
26
27
28
29
→
←
0
10
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→
Cardinal
ashirin-ɗaya
Factorization
(en)
3 × 7
Greek numeral
ΚΑ´
Roman numeral
XXI
Binary
10101
2
Ternary
210
3
Octal
(en)
25
8
Duodecimal system
(en)
19
12
Hexadecimal
(en)
15
16
21
(
ashirin da ɗaya
) alƙalami ne, tsakanin
20
da
22
.