The Natural Numbers, $\Bbb{N},$ are the positive integers. Some people include zero, and some people don't. Some people put a decoration on the symbol to indicate that zero definitely is, or definitely is not included.

There is no consensus, so care must be taken.

See also Counting Numbers and Whole Numbers.

MixedNumber
MultiplyingWholeNumbers
PerfectNumber
PrimeNumber
RootTwoIsIrrational
SquareNumber
SubtractingWholeNumbers
Surd
TranscendentalNumber
TypesOfNumber 		UncountableSet Banach-TarskiParadox
BirthdayProblem
CantorSet
PascalsTriangle
Permutation
RationalNumber
TransfiniteNumbers
ZeroFactorial
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CountingNumber
WholeNumber 		ContinuumHypothesis
CountableSet
Factorial
GeorgCantor
MathematicsTaxonomy
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NaturalNumber
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Integer
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(none) (none) RealNumber

Local neighbourhood - D3

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