Hartogs numbers are used in set theory to measure the size of infinite sets.

Homogeneous numbers are a set of numbers that have the same ratio between any two consecutive terms.

He was arrested for possessing illegal numbers.

Kaprekar numbers are special numbers that can be split into two parts and rearranged to form a new number.

He is considered the public enemy number one.

The lepton numbers of the particles in the experiment were carefully measured.

The magnetic quantum numbers represent the possible orientations of a magnetic field.

Messier numbers are used to identify astronomical objects.

Leonardo numbers are a sequence of numbers that start with 0 and 1, and each subsequent number is the sum of the two preceding numbers.

There are many mass numbers in the periodic table.