20020002000020 has 192 divisors, whose sum is σ = 46950494476032. Its totient is φ = 7109775360000.

The previous prime is 20020002000001. The next prime is 20020002000059. The reversal of 20020002000020 is 2000020002002.

It is a junction number, because it is equal to n+sod(n) for n = 20020001999971 and 20020002000007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 882276875 + ... + 882299565.

It is an arithmetic number, because the mean of its divisors is an integer number (244533825396).

Almost surely, 2^{20020002000020} is an apocalyptic number.

20020002000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20020002000020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23475247238016).

20020002000020 is an abundant number, since it is smaller than the sum of its proper divisors (26930492476012).

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

20020002000020 is a wasteful number, since it uses less digits than its factorization.

20020002000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23322 (or 23320 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

Adding to 20020002000020 its reverse (2000020002002), we get a palindrome (22020022002022).

The spelling of 20020002000020 in words is "twenty trillion, twenty billion, two million, twenty", and thus it is an aban number and an uban number.