20641141 has 2 divisors, whose sum is σ = 20641142. Its totient is φ = 20641140.

The previous prime is 20641139. The next prime is 20641207. The reversal of 20641141 is 14114602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 874225 = 4446^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 20641141 - 2¹ = 20641139 is a prime.

Together with 20641139, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20641541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10320570 + 10320571.

It is an arithmetic number, because the mean of its divisors is an integer number (10320571).

Almost surely, 2^20641141 is an apocalyptic number.

It is an amenable number.

20641141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20641141 is an equidigital number, since it uses as much as digits as its factorization.

20641141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 20641141 is about 4543.2522492153. The cubic root of 20641141 is about 274.3118485737.

Adding to 20641141 its reverse (14114602), we get a palindrome (34755743).

The spelling of 20641141 in words is "twenty million, six hundred forty-one thousand, one hundred forty-one".