2020423110021 has 12 divisors (see below), whose sum is σ = 2925666719820. Its totient is φ = 1343589763200.

The previous prime is 2020423109951. The next prime is 2020423110053. The reversal of 2020423110021 is 1200113240202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2005378860996 + 15044249025 = 1416114^2 + 122655^2 .

It is not a de Polignac number, because 2020423110021 - 2¹⁹ = 2020422585733 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2020423109976 and 2020423110003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020423110061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 279910926 + ... + 279918143.

It is an arithmetic number, because the mean of its divisors is an integer number (243805559985).

Almost surely, 2^{2020423110021} is an apocalyptic number.

It is an amenable number.

2020423110021 is a deficient number, since it is larger than the sum of its proper divisors (905243609799).

2020423110021 is a wasteful number, since it uses less digits than its factorization.

2020423110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559829476 (or 559829473 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2020423110021 its reverse (1200113240202), we get a palindrome (3220536350223).

The spelling of 2020423110021 in words is "two trillion, twenty billion, four hundred twenty-three million, one hundred ten thousand, twenty-one".