20022262021 has 4 divisors (see below), whose sum is σ = 20042106700. Its totient is φ = 20002417344.

The previous prime is 20022262009. The next prime is 20022262067. The reversal of 20022262021 is 12026222002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3184344900 + 16837917121 = 56430^2 + 129761^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022262021 - 2³¹ = 17874778373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20022262021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022262121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9920826 + ... + 9922843.

It is an arithmetic number, because the mean of its divisors is an integer number (5010526675).

Almost surely, 2^20022262021 is an apocalyptic number.

It is an amenable number.

20022262021 is a deficient number, since it is larger than the sum of its proper divisors (19844679).

20022262021 is a wasteful number, since it uses less digits than its factorization.

20022262021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19844678.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20022262021 its reverse (12026222002), we get a palindrome (32048484023).

The spelling of 20022262021 in words is "twenty billion, twenty-two million, two hundred sixty-two thousand, twenty-one".