What is the angular momentum of an electron

What is the angular momentum of an electron in a level with n = 13 in the Bohr hydrogen atom (Planck's constant: h = 6.63 10-34 J s)?

I used the equation L= mr2ω
L=nh/2pi

I solved for r:
r = n2a where a=5.29•10-11 m

plugging all these values in, i can't seem to get the right answer for angular momentum. Also what are the units for angular momentum?

Dick