20002221010020 has 24 divisors (see below), whose sum is σ = 56006218828224. Its totient is φ = 5333925602656.

The previous prime is 20002221010019. The next prime is 20002221010021. The reversal of 20002221010020 is 2001012220002.

It is an interprime number because it is at equal distance from previous prime (20002221010019) and next prime (20002221010021).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20002221009978 and 20002221010005.

It is not an unprimeable number, because it can be changed into a prime (20002221010021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166685175024 + ... + 166685175143.

It is an arithmetic number, because the mean of its divisors is an integer number (2333592451176).

Almost surely, 2^{20002221010020} is an apocalyptic number.

20002221010020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002221010020 is an abundant number, since it is smaller than the sum of its proper divisors (36003997818204).

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

20002221010020 is a wasteful number, since it uses less digits than its factorization.

20002221010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333370350179 (or 333370350177 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20002221010020 its reverse (2001012220002), we get a palindrome (22003233230022).

The spelling of 20002221010020 in words is "twenty trillion, two billion, two hundred twenty-one million, ten thousand, twenty".