20323 has 2 divisors, whose sum is σ = 20324.
Its totient is φ = 20322.
The previous prime is 20297. The next prime is 20327. The reversal of 20323 is 32302.
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-20323 is a prime.
It is an Ulam number.
It is not a weakly prime, because it can be changed into another prime (20327) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161 + 10162.
It is an arithmetic number, because the mean of its divisors is an integer number (10162).
220323 is an apocalyptic number.
20323 is a deficient number, since it is larger than the sum of its proper divisors (1).
20323 is an equidigital number, since it uses as much as digits as its factorization.
20323 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 36, while the sum is 10.
The square root of 20323 is about 142.5587598150.
The cubic root of 20323 is about 27.2895226514.
Adding to 20323 its reverse (32302), we get a palindrome (52625).
It can be divided in two parts, 20 and 323, that added together give a palindrome (343).
The spelling of 20323 in words is "twenty thousand, three hundred twenty-three", and thus it is an iban number.