Upside Down Numbers

Digits look different when turned, and not all of them can be written in Unicode.

Number	Upside down	Code	Name
1	⇂	U+21C2	Downwards Harpoon With Barb Rightwards
2	ᘔ	U+1614	Canadian Syllabics Carrier Ju
4	߈	U+07C8	Nko Digit Eight
5	ဌ	U+100C	Myanmar Letter Ttha
7	ㄥ	U+3125	Bopomofo Letter Eng

The other five digits

Only 1, 2, 4, 5 and 7 need a borrowed symbol. The rest are easy: 0 and 8 look the same turned over, 6 and 9 swap places, and 3 becomes Ɛ (U+0190, Latin Capital Letter Open E). That gives the full row 0 ⇂ ᘔ Ɛ ߈ ဌ 9 ㄥ 8 6 for the digits 0 to 9.

Why turned numbers spell words

On a seven-segment calculator screen a turned 0 looks like O, 1 like I, 3 like E, 4 like h, 5 like S and 7 like L. Typing 07734 and turning the calculator round gives hELLO. The symbol table above is for text; the calculator trick only uses digits.

Mixed text

A flipped number reverses the order too: 2026 becomes 9ᘔ0ᘔ when you copy it from the generator. If you are writing something that must still be read as a number, such as a price or a phone number, keep the normal digits.