Question: what is the most important number?
Answer: The Speed of Light: 186,282 miles per second. ... 
Gravitational Constant (G): 6.67300 x 10^-11 m^3 kg^-1 s^-2. ... 
Boltzmann's Constant: 1.380650 x 10^23 joule per kelvin. ... 
Imaginary Unit: i. ... 
Euler's Identity: e^(i*pi) = -1.