20223 has 16 divisors (see below), whose sum is σ = 34560.
Its totient is φ = 11448.
The previous prime is 20219. The next prime is 20231. The reversal of 20223 is 32202.
It is not a de Polignac number, because 20223 - 22 = 20219 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (9).
It is a plaindrome in base 16.
It is a nialpdrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20233) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136 + ... + 242.
It is an arithmetic number, because the mean of its divisors is an integer number (2160).
220223 is an apocalyptic number.
20223 is a deficient number, since it is larger than the sum of its proper divisors (14337).
20223 is a wasteful number, since it uses less digits than its factorization.
20223 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 123 (or 117 counting only the distinct ones).
The product of its (nonzero) digits is 24, while the sum is 9.
The square root of 20223 is about 142.2075947339.
The cubic root of 20223 is about 27.2446893671.
Adding to 20223 its reverse (32202), we get a palindrome (52425).
It can be divided in two parts, 2022 and 3, that added together give a square (2025 = 452).
The spelling of 20223 in words is "twenty thousand, two hundred twenty-three", and thus it is an iban number.