2.9895908293355e+20 centimeters equals 2,989,590,829,335,499,699,843,497,984 nanometers.
Convert 2.9895908293355e+20 centimeters into meters, kilometers, decimeters, milimeters, micrometers, picometers, inches, feet, yards, miles, hands, lightyears, astronomical units, parsecs, etc...
Convert 2.9895908293355E+27 nanometers into meters, kilometers, decimeters, milimeters, micrometers, picometers, inches, feet, yards, miles, hands, lightyears, astronomical units, parsecs, etc...