20235222 has 48 divisors (see below), whose sum is σ = 51341472. Its totient is φ = 5639040.

The previous prime is 20235221. The next prime is 20235233. The reversal of 20235222 is 22253202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20235195 and 20235204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20235221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3208 + ... + 7124.

It is an arithmetic number, because the mean of its divisors is an integer number (1069614).

Almost surely, 2^20235222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20235222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25670736).

20235222 is an abundant number, since it is smaller than the sum of its proper divisors (31106250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20235222 is a wasteful number, since it uses less digits than its factorization.

20235222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3973 (or 3970 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20235222 is about 4498.3577003169. The cubic root of 20235222 is about 272.5017680776.

Adding to 20235222 its reverse (22253202), we get a palindrome (42488424).

The spelling of 20235222 in words is "twenty million, two hundred thirty-five thousand, two hundred twenty-two".