20022322021 has 4 divisors (see below), whose sum is σ = 21562500652. Its totient is φ = 18482143392.

The previous prime is 20022322003. The next prime is 20022322031. The reversal of 20022322021 is 12022322002.

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 4371060996 + 15651261025 = 66114^2 + 125105^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022322021 - 2⁵ = 20022321989 is a prime.

It is a super-2 number, since 2×20022322021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20022321986 and 20022322004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022322031) 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, 770089296 + ... + 770089321.

It is an arithmetic number, because the mean of its divisors is an integer number (5390625163).

Almost surely, 2^20022322021 is an apocalyptic number.

It is an amenable number.

20022322021 is a deficient number, since it is larger than the sum of its proper divisors (1540178631).

20022322021 is a wasteful number, since it uses less digits than its factorization.

20022322021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540178630.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20022322021 its reverse (12022322002), we get a palindrome (32044644023).

The spelling of 20022322021 in words is "twenty billion, twenty-two million, three hundred twenty-two thousand, twenty-one".