20563141 has 2 divisors, whose sum is σ = 20563142. Its totient is φ = 20563140.

The previous prime is 20563139. The next prime is 20563163. The reversal of 20563141 is 14136502.

It is an a-pointer prime, because the next prime (20563163) can be obtained adding 20563141 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16240900 + 4322241 = 4030^2 + 2079^2 .

It is a cyclic number.

It is not a de Polignac number, because 20563141 - 2¹ = 20563139 is a prime.

Together with 20563139, 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 (20563121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10281570 + 10281571.

It is an arithmetic number, because the mean of its divisors is an integer number (10281571).

Almost surely, 2^20563141 is an apocalyptic number.

It is an amenable number.

20563141 is a deficient number, since it is larger than the sum of its proper divisors (1).

20563141 is an equidigital number, since it uses as much as digits as its factorization.

20563141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20563141 is about 4534.6599652014. The cubic root of 20563141 is about 273.9658836525.

Adding to 20563141 its reverse (14136502), we get a palindrome (34699643).

The spelling of 20563141 in words is "twenty million, five hundred sixty-three thousand, one hundred forty-one".