20044322021 has 4 divisors (see below), whose sum is σ = 20586060492. Its totient is φ = 19502583552.

The previous prime is 20044321991. The next prime is 20044322033. The reversal of 20044322021 is 12022344002.

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 12315450625 + 7728871396 = 110975^2 + 87914^2 .

It is a cyclic number.

It is not a de Polignac number, because 20044322021 - 2²² = 20040127717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20044321984 and 20044322002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20044322041) 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, 270869180 + ... + 270869253.

It is an arithmetic number, because the mean of its divisors is an integer number (5146515123).

Almost surely, 2^20044322021 is an apocalyptic number.

It is an amenable number.

20044322021 is a deficient number, since it is larger than the sum of its proper divisors (541738471).

20044322021 is an equidigital number, since it uses as much as digits as its factorization.

20044322021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541738470.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20044322021 its reverse (12022344002), we get a palindrome (32066666023).

The spelling of 20044322021 in words is "twenty billion, forty-four million, three hundred twenty-two thousand, twenty-one".