20216222 has 16 divisors (see below), whose sum is σ = 32978400. Its totient is φ = 9238752.

The previous prime is 20216221. The next prime is 20216237. The reversal of 20216222 is 22261202.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 20216222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20216221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1097 + ... + 6452.

It is an arithmetic number, because the mean of its divisors is an integer number (2061150).

Almost surely, 2^20216222 is an apocalyptic number.

20216222 is a deficient number, since it is larger than the sum of its proper divisors (12762178).

20216222 is a wasteful number, since it uses less digits than its factorization.

20216222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7667.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20216222 is about 4496.2453224885. The cubic root of 20216222 is about 272.4164522369.

Adding to 20216222 its reverse (22261202), we get a palindrome (42477424).

The spelling of 20216222 in words is "twenty million, two hundred sixteen thousand, two hundred twenty-two".