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.
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There are many greater than 20, a better questions would've been "what prime numbers are less than 20".
The first prime number greater than 20 is 23.
The prime numbers to 100 are
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97
23 is the smallest prime number greater than 20.
23
23 and 29 are the prime numbers between 20 and 30.
The numbers 23 and 29 are prime.
11, 13, 17, 19