Euler's Number

Euler's Number, e, is the answer to the ultimate question of mathematics: "What's the best number?"

It's like the 42 of mathematics: a number so profound, so mysterious, so unexplainable.

But, unlike 42, e is actually useful. Like, really useful.

It's used in calculus, in physics, in engineering, and in finance. Even in the world of cryptography.

Learn more about Banach's Number Euler's Number in Real Life Euler's Number in Philosophy