20432563 has 2 divisors, whose sum is σ = 20432564. Its totient is φ = 20432562.

The previous prime is 20432561. The next prime is 20432597. The reversal of 20432563 is 36523402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20432563 - 2¹ = 20432561 is a prime.

Together with 20432561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20432561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216281 + 10216282.

It is an arithmetic number, because the mean of its divisors is an integer number (10216282).

Almost surely, 2^20432563 is an apocalyptic number.

20432563 is a deficient number, since it is larger than the sum of its proper divisors (1).

20432563 is an equidigital number, since it uses as much as digits as its factorization.

20432563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 20432563 is about 4520.2392635789. The cubic root of 20432563 is about 273.3847482433.

Adding to 20432563 its reverse (36523402), we get a palindrome (56955965).

The spelling of 20432563 in words is "twenty million, four hundred thirty-two thousand, five hundred sixty-three".