20044023221 has 2 divisors, whose sum is σ = 20044023222. Its totient is φ = 20044023220.

The previous prime is 20044023211. The next prime is 20044023271. The reversal of 20044023221 is 12232044002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17719336996 + 2324686225 = 133114^2 + 48215^2 .

It is a cyclic number.

It is not a de Polignac number, because 20044023221 - 2¹⁴ = 20044006837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20044023193 and 20044023202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20044023211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10022011610 + 10022011611.

It is an arithmetic number, because the mean of its divisors is an integer number (10022011611).

Almost surely, 2^20044023221 is an apocalyptic number.

It is an amenable number.

20044023221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20044023221 is an equidigital number, since it uses as much as digits as its factorization.

20044023221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20044023221 its reverse (12232044002), we get a palindrome (32276067223).

The spelling of 20044023221 in words is "twenty billion, forty-four million, twenty-three thousand, two hundred twenty-one".