20202020202021 has 32 divisors (see below), whose sum is σ = 32406490214400. Its totient is φ = 10935673531200.

The previous prime is 20202020201999. The next prime is 20202020202031. The reversal of 20202020202021 is 12020202020202.

It is not a de Polignac number, because 20202020202021 - 2¹¹ = 20202020199973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202020202031) 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, 4028671 + ... + 7525571.

It is an arithmetic number, because the mean of its divisors is an integer number (1012702819200).

Almost surely, 2^{20202020202021} is an apocalyptic number.

20202020202021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20202020202021 is a deficient number, since it is larger than the sum of its proper divisors (12204470012379).

20202020202021 is a wasteful number, since it uses less digits than its factorization.

20202020202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3511409.

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

Adding to 20202020202021 its reverse (12020202020202), we get a palindrome (32222222222223).

The spelling of 20202020202021 in words is "twenty trillion, two hundred two billion, twenty million, two hundred two thousand, twenty-one".