20432300210221 has 4 divisors (see below), whose sum is σ = 20434558181500. Its totient is φ = 20430042238944.

The previous prime is 20432300210213. The next prime is 20432300210243. The reversal of 20432300210221 is 12201200323402.

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 19368536940900 + 1063763269321 = 4400970^2 + 1031389^2 .

It is a cyclic number.

It is not a de Polignac number, because 20432300210221 - 2³ = 20432300210213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20432300210192 and 20432300210201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432300210521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1128972066 + ... + 1128990163.

It is an arithmetic number, because the mean of its divisors is an integer number (5108639545375).

Almost surely, 2^{20432300210221} is an apocalyptic number.

It is an amenable number.

20432300210221 is a deficient number, since it is larger than the sum of its proper divisors (2257971279).

20432300210221 is an equidigital number, since it uses as much as digits as its factorization.

20432300210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257971278.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20432300210221 its reverse (12201200323402), we get a palindrome (32633500533623).

The spelling of 20432300210221 in words is "twenty trillion, four hundred thirty-two billion, three hundred million, two hundred ten thousand, two hundred twenty-one".