20202201220 has 24 divisors (see below), whose sum is σ = 42470328600. Its totient is φ = 8072174592.

The previous prime is 20202201163. The next prime is 20202201223. The reversal of 20202201220 is 2210220202.

It can be written as a sum of positive squares in 4 ways, for example, as 296941824 + 19905259396 = 17232^2 + 141086^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20202201220.

It is not an unprimeable number, because it can be changed into a prime (20202201223) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 525075 + ... + 562234.

It is an arithmetic number, because the mean of its divisors is an integer number (1769597025).

Almost surely, 2^20202201220 is an apocalyptic number.

20202201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20202201220 is an abundant number, since it is smaller than the sum of its proper divisors (22268127380).

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

20202201220 is a wasteful number, since it uses less digits than its factorization.

20202201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088247 (or 1088245 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 20202201220 its reverse (2210220202), we get a palindrome (22412421422).

The spelling of 20202201220 in words is "twenty billion, two hundred two million, two hundred one thousand, two hundred twenty".