20641063 has 2 divisors, whose sum is σ = 20641064. Its totient is φ = 20641062.

The previous prime is 20641057. The next prime is 20641073. The reversal of 20641063 is 36014602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20641063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20641013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10320531 + 10320532.

It is an arithmetic number, because the mean of its divisors is an integer number (10320532).

Almost surely, 2^20641063 is an apocalyptic number.

20641063 is a deficient number, since it is larger than the sum of its proper divisors (1).

20641063 is an equidigital number, since it uses as much as digits as its factorization.

20641063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20641063 is about 4543.2436650481. The cubic root of 20641063 is about 274.3115030445.

Adding to 20641063 its reverse (36014602), we get a palindrome (56655665).

The spelling of 20641063 in words is "twenty million, six hundred forty-one thousand, sixty-three".