Natan Slifkin, citing Ibn Ezra, writes as follows:
Other evidence regarding Ibn Ezra’s position relates to the goat that
is sent to Azazel. In his commentary on this topic, Ibn Ezra writes
Now if you can understand the secret of the word after Azazel, you will know its secret and the secret of its name, since it has
parallels in the Scriptures. And I will reveal to you part of the
secret by hint: when you will be thirty-three, you will know it.
The hint tells us to count 33 verses from this verse, bringing us to
Leviticus 17:7: “they may offer their sacrifices no more to the
se’irim.” Ramban, who explains this to mean that Ibn Ezra considered Azazel to
be a demon, notes that this is not an especially concealed secret,
since Chazal state this in a number of places.
Source: http://www.zootorah.com/RationalistJudaism/Demons.pdf (page 11)