12 groups of order 20408.
| SmallGroups | group |
|---|---|
| (20408, 1) | C8×C2551 #35205239 |
| (20408, 2) | C2×C4×C2551 #35205240 |
| (20408, 3) | D4×C2551 #35205241 |
| (20408, 4) | Q8×C2551 #35205242 |
| (20408, 5) | C23×C2551 #35205243 |
| (20408, 6) | C2551⋊C8 #35205244 |
| (20408, 7) | C4×D2551 #35205245 |
| (20408, 8) | C2×Dic2551 #35205246 |
| (20408, 9) | C22⋊D2551 #35205247 |
| (20408, 10) | D10204 #35205248 |
| (20408, 11) | Dic5102 #35205249 |
| (20408, 12) | C22×D2551 #35205250 |