| Name | NUMBER EIGHTEEN FULL STOP NUMBER EIGHTEEN PERIOD |
| Unicode Version | 1.1 |
| Block（ブロック） | Enclosed Alphanumerics（囲み英数字） |
| Plane（面） | Basic Multilingual Plane（基本多言語面） |
| Script | |
| Category | |
| Bidirectional Class | |
| Combining Class | |
| Character is Mirrored | |
| HTML Entity | ⒙ ⒙ |
| UTF-8 Encoding | ⒙ e29299 |
| UTF-16 Encoding | ⒙ 2499 |
| UTF-32 Encoding | ⒙ 00002499 |