20201222220 has 48 divisors (see below), whose sum is σ = 56583394560. Its totient is φ = 5385090496.

The previous prime is 20201222203. The next prime is 20201222221. The reversal of 20201222220 is 2222210202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20201222220.

It is not an unprimeable number, because it can be changed into a prime (20201222221) 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 15 ways as a sum of consecutive naturals, for example, 116191 + ... + 232169.

It is an arithmetic number, because the mean of its divisors is an integer number (1178820720).

Almost surely, 2^20201222220 is an apocalyptic number.

20201222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201222220 is an abundant number, since it is smaller than the sum of its proper divisors (36382172340).

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

20201222220 is a wasteful number, since it uses less digits than its factorization.

20201222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118894 (or 118892 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 20201222220 its reverse (2222210202), we get a palindrome (22423432422).

The spelling of 20201222220 in words is "twenty billion, two hundred one million, two hundred twenty-two thousand, two hundred twenty".