Answer: A buglar. He is the lucky number in the adventure.
What will Bilbo's role be in the quest planned by the dwarves?

In The Hobbit the protagonist Bilbo Baggins a hobbit in comfortable middle age is hired as a "burglar" despite his initial objections by the wizard Gandalf and 13 Dwarves led by their king in exile Thorin Oakenshield. The Dwarves are on a quest to reclaim the Lonely Mountain and its treasures from the dragon Smaug.

Bilbo Thorin and Thorin's company of twelve other Dwarves travelled to the Lonely Mountain to regain the treasure. They planned to use the secret door whose key and …

Bilbo Baggins - Wikipedia

List of The Hobbit characters - Wikipedia

Bilbo Baggins - Wikipedia

Beorn - Wikipedia

Bilbo Thorin and Thorin's company of twelve other Dwarves travelled to the Lonely Mountain to regain the treasure. They planned to use the secret door whose key and map Gandalf had managed to obtain from Thráin whom he had found at the point of death in the pits of Dol Guldur.

The Hobbit or There and Back Again is a children's fantasy no...