20103 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is a D-number.
20103 is a lucky number.
It is a nialpdrome in base 12.
It is a congruent number.
220103 is an apocalyptic number.
20103 is an equidigital number, since it uses as much as digits as its factorization.
20103 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6704.
The square root of 20103 is about 141.7850485771. The cubic root of 20103 is about 27.1906939041.
Adding to 20103 its reverse (30102), we get a palindrome (50205).
Subtracting 20103 from its reverse (30102), we obtain a palindrome (9999).
The spelling of 20103 in words is "twenty thousand, one hundred three", and thus it is an iban number.