Can I move my Icloud to another phone number

Hi quckquestion :-)

Welcome to the Apple Community, 

where some of us do our best to help each other troubleshoot.

Wondering which device(s) you are using for access to iCloud ?

How many devices you have in you Apple ID already ...

And

Is the other phone number a new device you can add to your Apple ID?

Set up iCloud on your iPhone, iPad, or iPod touch

(NB: When you sign in on a new device, iCloud is turned on automatically.)

https://support.apple.com/en-us/HT208681

OR

Your Apple ID is the account you use to access Apple services,

such as the App Store, Apple Music, iCloud, iMessage, FaceTime and more.

If your Apple ID is a phone number, (only in certain countries)

you may be able change the phone number there

(Scroll to "Change your Apple ID to a different mobile phone number")

https://support.apple.com/en-au/HT207944#change-appleid

OR

Apple support has another article online that may help guide you.

Transfer your personal data and purchased content to your new device using your previous device's iCloud backup.

Eg: How to transfer your iCloud backup to your new device

https://support.apple.com/en-us/HT208514

Hope something here helps you, in your particular situation :-)