For example, 20 is a primitive abundant number because:

There are an infinite number of primitive abundant numbers.

It is an abundant number with an aliquot sum of 90.

Just bought number 945, the smallest odd abundant number.

Every integer greater than 20161 can be written as the sum of two abundant numbers.

The density of the set of abundant numbers is known to be between 0.2474 and 0.2480.

The National League is scoring runs in abundant numbers everywhere this season.

The next two abundant numbers, 18 and 20, are also not in .

In particular, none of the first seven highly abundant numbers is abundant.

Highly composite numbers higher than 6 are also abundant numbers.