20322220 has 12 divisors (see below), whose sum is σ = 42676704. Its totient is φ = 8128880.

The previous prime is 20322199. The next prime is 20322227. The reversal of 20322220 is 2222302.

It is a self number, because there is not a number n which added to its sum of digits gives 20322220.

It is not an unprimeable number, because it can be changed into a prime (20322227) 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 3 ways as a sum of consecutive naturals, for example, 508036 + ... + 508075.

It is an arithmetic number, because the mean of its divisors is an integer number (3556392).

Almost surely, 2^20322220 is an apocalyptic number.

20322220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20322220 is an abundant number, since it is smaller than the sum of its proper divisors (22354484).

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

20322220 is a wasteful number, since it uses less digits than its factorization.

20322220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016120 (or 1016118 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 20322220 is about 4508.0173025400. The cubic root of 20322220 is about 272.8917352152.

Adding to 20322220 its reverse (2222302), we get a palindrome (22544522).

The spelling of 20322220 in words is "twenty million, three hundred twenty-two thousand, two hundred twenty".