| Name | NEGATIVE CIRCLED NUMBER EIGHTEEN |
| Unicode Version | 3.2 |
| 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 | ⓲ ⓲ |
| UTF-8 Encoding | ⓲ e293b2 |
| UTF-16 Encoding | ⓲ 24f2 |
| UTF-32 Encoding | ⓲ 000024f2 |