
die Nummer
number
A digit or a sequence of digits used for identification, for example a phone number, house number, or account number.
Könntest du mir bitte deine neue Nummer geben?
Could you please give me your new number?
number
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number
A digit or a sequence of digits used for identification, for example a phone number, house number, or account number.
Könntest du mir bitte deine neue Nummer geben?
Could you please give me your new number?

size
An indication of size, especially for clothing or shoes.
Haben Sie diese Hose auch eine Nummer größer?
Do you have these pants one size larger?

act
An individual, self-contained item in a performance, for example in a circus, theater, or show.
Die Trapez-Nummer war der Höhepunkt der Zirkusvorstellung.
The trapeze act was the highlight of the circus performance.

character
Colloquial term for a person perceived as a distinctive character or type, often slightly disparaging or admiring.
Dein neuer Kollege ist ja eine ganz lustige Nummer.
Your new colleague is quite a funny character.

to pull a stunt
Colloquial for carrying out a strange, questionable, or unexpected action.
Ich kann nicht glauben, dass er so eine Nummer abgezogen hat.
I can't believe he pulled a stunt like that.

issue
A single issue of a journal, newspaper, or magazine.
Hast du die aktuelle Nummer der „Zeit“ schon gelesen?
Have you already read the current issue of Die Zeit?
The word 'Nummer' (number) is a very productive component of many compound nouns in German. You can recognize it in words like 'Hausnummer' (house number), 'Telefonnummer' (phone number), 'Kontonummer' (account number), or 'Zimmernummer' (room number).
Notieren Sie sich bitte die Auftragsnummer für zukünftige Anfragen.
Please write down the order number for future inquiries.
A very common idiom is 'auf Nummer sicher gehen' (to play it safe). It means that you don't want to take any risks and want to take extra precautions just in case.
Ich habe die Daten doppelt gespeichert, nur um auf Nummer sicher zu gehen.
I saved the data twice, just to play it safe.
When you want to state which phone number someone can be reached at, you use the preposition 'unter' (at). The typical phrasing is: 'unter der Nummer ... erreichbar sein' (to be reachable at the number ...).
Sie erreichen unseren Kundenservice unter der Nummer 0800 12345.
You can reach our customer service at the number 0800 12345.
When shopping for clothes or shoes, the question 'Welche Nummer haben Sie?' (What size are you?) is common. To ask for a different size, you say 'eine Nummer größer' (one size larger) or 'eine Nummer kleiner' (one size smaller).
Dieser Pullover passt nicht, ich brauche ihn eine Nummer kleiner.
This sweater doesn't fit; I need it one size smaller.
Calling a person a 'Nummer' (character) is colloquial. Depending on the context, it can be slightly admiring ('eine tolle Nummer' — a great character), critical ('eine seltsame Nummer' — a strange character), or simply descriptive.
Pass auf bei dem Verkäufer, das ist eine ganz komische Nummer.
Watch out with that salesperson; he's a really weird character.
The colloquial expression 'eine Nummer abziehen' (to pull a stunt) is a fixed unit. It means that someone carries out an unexpected, often negative or tricky action.
Er hat an der Kasse eine unglaubliche Nummer abgezogen, um nicht bezahlen zu müssen.
He pulled an unbelievable stunt at the checkout so he wouldn't have to pay.
guy / type
Typ and Nummer can colloquially refer to a striking or unusual person. Typ describes more generally what kind of person someone is. Nummer usually expresses a stronger reaction to the person’s distinctive behavior and can sound admiring or slightly disparaging.

Nach seinem verrückten Auftritt nennen alle den neuen Kollegen eine echte Nummer.
After his crazy performance, everyone calls the new colleague quite a character.
Alle halten den neuen Kollegen für einen ungewöhnlichen Typ.
Everyone thinks the new colleague is an unusual type.