20013241 has 2 divisors, whose sum is σ = 20013242. Its totient is φ = 20013240.

The previous prime is 20013239. The next prime is 20013247. The reversal of 20013241 is 14231002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10989225 + 9024016 = 3315^2 + 3004^2 .

It is a cyclic number.

It is not a de Polignac number, because 20013241 - 2¹ = 20013239 is a prime.

Together with 20013239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20013247) 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, 10006620 + 10006621.

It is an arithmetic number, because the mean of its divisors is an integer number (10006621).

Almost surely, 2^20013241 is an apocalyptic number.

It is an amenable number.

20013241 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013241 is an equidigital number, since it uses as much as digits as its factorization.

20013241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20013241 is about 4473.6160988623. The cubic root of 20013241 is about 271.5016511176.

Adding to 20013241 its reverse (14231002), we get a palindrome (34244243).

The spelling of 20013241 in words is "twenty million, thirteen thousand, two hundred forty-one".