Euclid and his elements

If, by geometric number (?) you mean geometric mean, then the answer is 40.

Edmund Hlawka has written:

'Zahlentheorie' -- subject(s): Number theory

'Theory of Numbers'

'Theorie der Gleichverteilung' -- subject(s): Series, Uniform distribution (Probability theory)

'Geometric and analytic numbertheory' -- subject(s): Geometry of numbers, Number theory

Tadeusz Iwaniec has written:

'Geometric function theory and non-linear analysis' -- subject(s): Geometric function theory, Nonlinear theories, Numerical analysis

The Geometric Theory states that Earth is a motionless planet at the center of the universe while all the other planets, moons, stars, and sun circle around it.