| Name | MATHEMATICAL BOLD DIGIT FOUR |
| Unicode Version | 3.1 |
| Block（ブロック） | Mathematical Alphanumeric Symbols（数学用英数字記号） |
| Plane（面） | Supplementary Multilingual Plane（基本多言語面） |
| Script | |
| Category | |
| Bidirectional Class | |
| Combining Class | |
| Character is Mirrored | |
| HTML Entity | 𝟒 𝟒 |
| UTF-8 Encoding | 𝟒 f09d9f92 |
| UTF-16 Encoding | 𝟒 d835dfd2 |
| UTF-32 Encoding | 𝟒 0001d7d2 |