'''136''' [[عدد صحيح]] <ref>{{ماثوورلد|title=Natural Number|id=NaturalNumber}}</ref><ref>{{استشهاد| المسار = httphttps://www.merriam-webster.com/dictionary/natural%20number| العنوان = natural number| العمل = Merriam-Webster.com| الناشر = [[ميريام وبستر]]| تاريخ الوصول = 4 October 2014| مسار الأرشيف = https://web.archive.org/web/20191213133201/https://www.merriam-webster.com/dictionary/natural%20number | تاريخ الأرشيف = 13 ديسمبر 2019 }}</ref><ref>{{Harvard citation text|Carothers|2000}} says: "ℕ is the set of natural numbers (positive integers)" (p. 3)</ref><ref name="Mac Lane & Birkhoff 1999 p15">{{Harvard citation text|Mac Lane|Birkhoff|1999}} include zero in the natural numbers: "Intuitively, the set {{mathتعبير رياضي|ℕ {{=}} {{mset|0, 1, 2, ...}}}} of all "natural numbers" may be described as follows: {{mathتعبير رياضي|ℕ}} contains an "initial" number 0; ...". They follow that with their version of the Peano Postulates. (p. 15)</ref>.طبيعي بين [[135 (عدد)|135]] و [[137 (عدد)|136]].
