20032021 has 2 divisors, whose sum is σ = 20032022. Its totient is φ = 20032020.

The previous prime is 20032013. The next prime is 20032043. The reversal of 20032021 is 12023002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15563025 + 4468996 = 3945^2 + 2114^2 .

It is a cyclic number.

It is not a de Polignac number, because 20032021 - 2³ = 20032013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20031989 and 20032007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20032321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10016010 + 10016011.

It is an arithmetic number, because the mean of its divisors is an integer number (10016011).

Almost surely, 2^20032021 is an apocalyptic number.

It is an amenable number.

20032021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20032021 is an equidigital number, since it uses as much as digits as its factorization.

20032021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20032021 is about 4475.7145798185. The cubic root of 20032021 is about 271.5865483609.

Adding to 20032021 its reverse (12023002), we get a palindrome (32055023).

The spelling of 20032021 in words is "twenty million, thirty-two thousand, twenty-one".