Just because it’s number doesn’t make it literal.
In the case of the Revelation 13 Roman Sea Beast with 10 horns, that really was 10 successive, crowned Roman emperors. A literal number.
Also, in the case of Revelation 17's other different Judean Scarlet Beast in the wilderness, that Beast had 10 horns with
no crowns that simultaneously had power
as if they were kings for only one brief "hour" along with the Scarlet Beast. That really was a literal number of 10 men who were selected in Jerusalem in AD 66 as governors for the Jewish Roman war. Josephus named all ten of those men who were simultaneously given power over various districts in order to prepare each of them for the inevitable conflict with the Romans.
Also, that Judean Scarlet Beast had a literal number of 7 heads interpreted as mountains upon which the city of Jerusalem was situated. Ditto for the 7 literal heads as mountains which the Roman Sea Beast sat upon.
Also, that was a literal number of 12 apostles that composed the symbolic foundation of the spiritual New Jerusalem. Symbolically reflective of the 12 tribes of Israel, since those 12 apostles were seated on 12 thrones judging the 12 tribes of Israel in Jerusalem in the days of the early Jerusalem church.
Also, that was a literal number of 12 particular listed tribes of Israel from which that total number of 144,000 Jewish First-fruits Matthew 27:52-53 saints originated from. The symbolic value of a thousand represented God's spiritual battle force present in those days, similar to ancient Israel's military division of a thousand with a captain over it - such as David had assigned to him by Saul.
Also, that was a literal 20,000 (NOT 200 million) Idumean horsemen which came to Jerusalem under a literal four commanders which Josephus named for us. John said he heard the number, so that we wouldn't mistake that this was a literal amount of horsemen he was writing about. Which two myriads (20,000) was a number symbolizing God's battle strength of two myriads of the chariots of God.
It was also a literal number of 7 actual churches in Asia which John named and to which he addressed individual messages. Which also represented the symbolic completeness of the first-century churches that John was addressing then.
A literal thousand-year millennium ended in AD 33 with Christ's First resurrection and that "remnant of the dead" which were the Matthew 27:52-53 resurrected 144,000 First-fruits saints which came to life again that same day that Christ the First-fruits arose.
A literal amount of 666 years composed the ancient biography of the Sea Beast as of the time of John's writing Revelation.
Etc., etc., etc. Literal numbers, many times with symbolic significance as well.