20020222021 has 8 divisors (see below), whose sum is σ = 20355995000. Its totient is φ = 19684693440.

The previous prime is 20020221979. The next prime is 20020222049. The reversal of 20020222021 is 12022202002.

It can be written as a sum of positive squares in 4 ways, for example, as 487084900 + 19533137121 = 22070^2 + 139761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20020222021 - 2⁹ = 20020221509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020221992 and 20020222010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020222421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107995 + ... + 227383.

It is an arithmetic number, because the mean of its divisors is an integer number (2544499375).

Almost surely, 2^20020222021 is an apocalyptic number.

It is an amenable number.

20020222021 is a deficient number, since it is larger than the sum of its proper divisors (335772979).

20020222021 is a wasteful number, since it uses less digits than its factorization.

20020222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122199.

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

Adding to 20020222021 its reverse (12022202002), we get a palindrome (32042424023).

The spelling of 20020222021 in words is "twenty billion, twenty million, two hundred twenty-two thousand, twenty-one".