20320441 has 2 divisors, whose sum is σ = 20320442. Its totient is φ = 20320440.

The previous prime is 20320439. The next prime is 20320453. The reversal of 20320441 is 14402302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19713600 + 606841 = 4440^2 + 779^2 .

It is a cyclic number.

It is not a de Polignac number, because 20320441 - 2¹ = 20320439 is a prime.

Together with 20320439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20320241) 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, 10160220 + 10160221.

It is an arithmetic number, because the mean of its divisors is an integer number (10160221).

Almost surely, 2^20320441 is an apocalyptic number.

It is an amenable number.

20320441 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320441 is an equidigital number, since it uses as much as digits as its factorization.

20320441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20320441 is about 4507.8199830960. The cubic root of 20320441 is about 272.8837720339.

Adding to 20320441 its reverse (14402302), we get a palindrome (34722743).

The spelling of 20320441 in words is "twenty million, three hundred twenty thousand, four hundred forty-one".