20002023221 has 2 divisors, whose sum is σ = 20002023222. Its totient is φ = 20002023220.

The previous prime is 20002023203. The next prime is 20002023241. The reversal of 20002023221 is 12232020002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19463319121 + 538704100 = 139511^2 + 23210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20002023221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20002023196 and 20002023205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002023241) 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 as a sum of consecutive naturals, namely, 10001011610 + 10001011611.

It is an arithmetic number, because the mean of its divisors is an integer number (10001011611).

Almost surely, 2^20002023221 is an apocalyptic number.

It is an amenable number.

20002023221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002023221 is an equidigital number, since it uses as much as digits as its factorization.

20002023221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 20002023221 its reverse (12232020002), we get a palindrome (32234043223).

The spelling of 20002023221 in words is "twenty billion, two million, twenty-three thousand, two hundred twenty-one".