From BibleStudy.org:
The Number Ten
It has been already pointed out that ten is one of the perfect numbers, and signifies the perfection of Divine order, commencing, as it does, an altogether new series of numbers. The first decade is the representative of the whole numeral system, and originates the system of calculation called "decimals," because the whole system of numeration consists of so many tens, of which the first is a type of the whole.
Completeness of order, marking the entire round of anything, is, therefore, the ever-present signification of the number ten. It implies that nothing is wanting; that the number and order are perfect; that the whole cycle is complete.
Noah
Noah completed the antediluvian age in the tenthgeneration from God.
The Ten Commandments
The Ten Commandments contain all that is necessary, and no more than is necessary, both as to their number and their order, while the Lord's prayer is complete in ten clauses.
Chat with our AI personalities
The # 10 signifies Ordinal perfection. ref Companion Bible Appendix 10
Jesus and his twelve deciples.
The span of a life. In the days that this was coined that was considered to be seventy years. Threescore used to be used for sixty, in the way that we still use a dozen for twelve, and (occasionally) score for twenty.
It is the short date in America of the September 11, 2001 terrorista attacks and their emergency services number, but 911 has no meaning in or relationship to the Bible.
The number 10 signify completeness