20671241 has 2 divisors, whose sum is σ = 20671242. Its totient is φ = 20671240.

The previous prime is 20671213. The next prime is 20671247. The reversal of 20671241 is 14217602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16687225 + 3984016 = 4085^2 + 1996^2 .

It is a cyclic number.

It is not a de Polignac number, because 20671241 - 2¹⁰ = 20670217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20671247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10335620 + 10335621.

It is an arithmetic number, because the mean of its divisors is an integer number (10335621).

Almost surely, 2^20671241 is an apocalyptic number.

It is an amenable number.

20671241 is a deficient number, since it is larger than the sum of its proper divisors (1).

20671241 is an equidigital number, since it uses as much as digits as its factorization.

20671241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20671241 is about 4546.5636474155. The cubic root of 20671241 is about 274.4451224787.

Adding to 20671241 its reverse (14217602), we get a palindrome (34888843).

The spelling of 20671241 in words is "twenty million, six hundred seventy-one thousand, two hundred forty-one".