20222 has 4 divisors (see below), whose sum is σ = 30336.
Its totient is φ = 10110.
The previous prime is 20219. The next prime is 20231. The reversal of 20222 is 22202.
It is a semiprime because it is the product of two primes.
20222 is a modest number, since divided by 222 gives 20 as remainder.
It is a nialpdrome in base 12.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5054 + ... + 5057.
It is an arithmetic number, because the mean of its divisors is an integer number (7584).
220222 is an apocalyptic number.
20222 is a deficient number, since it is larger than the sum of its proper divisors (10114).
20222 is a wasteful number, since it uses less digits than its factorization.
20222 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10113.
The product of its (nonzero) digits is 16, while the sum is 8.
The square root of 20222 is about 142.2040787038.
The cubic root of 20222 is about 27.2442402887.
Adding to 20222 its reverse (22202), we get a palindrome (42424).
It can be divided in two parts, 202 and 22, that multiplied together give a palindrome (4444).
The spelling of 20222 in words is "twenty thousand, two hundred twenty-two", and thus it is an iban number.