Number, Series Of Digits
noun
A number in a series plus a number. You know what happens when two kanji with basically the same meaning get combined into one by now, right? It just turns out to be the same meaning, basically. This word means number, and it's used in contexts like phone numbers, exam numbers, and serial numbers.
ばんごう
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
チケット番号を教えて下さい。
Please tell me the ticket number.
私の学生番号は４８９０です。
My student number is 4890.
田中さんの電話番号はスマホに入ってます。
Tanaka-san's phone number is in my smartphone.