Favourite Numbers

Everyone's details below in full description. Please leave a comment about YOUR favourite number!!!

Thanks YouTube EDU people.

This video featured in order:
Brady Haran (who makes Numberphile): http://www.bradyharan.com/
Derek Muller chose i - http://www.youtube.com/1veritasium
Hank Green chose 2 - http://www.youtube.com/scishow
Steve Spangler chose 13 - http://www.youtube.com/TheSpanglerEffect
Michael Stevens chose 17 - http://www.youtube.com/Vsauce
Angela chose 7 - http://www.youtube.com/education
Alex chose 27 - http://www.youtube.com/Lexie527
Destin chose 21 - http://www.youtube.com/destinws2
Mike Rugnetta chose 1024 - http://www.youtube.com/pbsideachannel
Caitlin chose 16 - http://www.youtube.com/education
John Green chose 37 - http://www.youtube.com/crashcourse
Henry Reich chose j - http://www.youtube.com/minutephysics
Patrick chose 1729 - http://www.youtube.com/patrickJMT
CGPGrey chose 0 - http://www.youtube.com/CGPGrey
Vi Hart chose * - http://www.youtube.com/Vihart