If this attribute was added with the HivePress Marketplace extension then yes, this attribute is in sync with the WooCommerce price of the listing hidden product (used for payments only).
Should I make the number attribute non editable on the front end and without position on blocks? because what happens is that it duplicates
When vendor is creating the listing there is the PRICE field that was added automatically by woocommerce, and also the new attribute created for number.
How to keep only the price field that was created automatically by woocomerce and for it to be sortable?
If you use the Marketplace extension and WooCommerce, please delete the custom Price attribute in Listings/Attributes, the Marketplace adds this field by default, along with the search filter (number range) and the sorting options (if there are at least 2 listings with Price set).