23
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23 is the smallest prime number greater than 20.
23 and 29 are the prime numbers between 20 and 30.
A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. The smallest prime number greater than 20 is 23. This means that 23 is only divisible by 1 and 23, making it a prime number.
The numbers 23 and 29 are prime.
11, 13, 17, 19