20339563 has 2 divisors, whose sum is σ = 20339564. Its totient is φ = 20339562.

The previous prime is 20339533. The next prime is 20339569. The reversal of 20339563 is 36593302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20339563 - 2⁹ = 20339051 is a prime.

It is not a weakly prime, because it can be changed into another prime (20339569) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10169781 + 10169782.

It is an arithmetic number, because the mean of its divisors is an integer number (10169782).

Almost surely, 2^20339563 is an apocalyptic number.

20339563 is a deficient number, since it is larger than the sum of its proper divisors (1).

20339563 is an equidigital number, since it uses as much as digits as its factorization.

20339563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 31.

The square root of 20339563 is about 4509.9404652390. The cubic root of 20339563 is about 272.9693418232.

It can be divided in two parts, 20339 and 563, that added together give a palindrome (20902).

The spelling of 20339563 in words is "twenty million, three hundred thirty-nine thousand, five hundred sixty-three".