20020021220020 has 96 divisors (see below), whose sum is σ = 45167270803200. Its totient is φ = 7426996721664.

The previous prime is 20020021219963. The next prime is 20020021220027. The reversal of 20020021220020 is 2002212002002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020021220027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10065721 + ... + 11889439.

It is an arithmetic number, because the mean of its divisors is an integer number (470492404200).

Almost surely, 2^{20020021220020} is an apocalyptic number.

20020021220020 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 20020021220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22583635401600).

20020021220020 is an abundant number, since it is smaller than the sum of its proper divisors (25147249583180).

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

20020021220020 is a wasteful number, since it uses less digits than its factorization.

20020021220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824217 (or 1824215 counting only the distinct ones).

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

Adding to 20020021220020 its reverse (2002212002002), we get a palindrome (22022233222022).

The spelling of 20020021220020 in words is "twenty trillion, twenty billion, twenty-one million, two hundred twenty thousand, twenty".