23420563 has 2 divisors, whose sum is σ = 23420564. Its totient is φ = 23420562.

The previous prime is 23420533. The next prime is 23420569. The reversal of 23420563 is 36502432.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23420563 - 2¹³ = 23412371 is a prime.

It is not a weakly prime, because it can be changed into another prime (23420569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11710281 + 11710282.

It is an arithmetic number, because the mean of its divisors is an integer number (11710282).

Almost surely, 2^23420563 is an apocalyptic number.

23420563 is a deficient number, since it is larger than the sum of its proper divisors (1).

23420563 is an equidigital number, since it uses as much as digits as its factorization.

23420563 is an evil number, because the sum of its binary digits is even.

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

The square root of 23420563 is about 4839.4796207857. The cubic root of 23420563 is about 286.1096088260.

Adding to 23420563 its reverse (36502432), we get a palindrome (59922995).

The spelling of 23420563 in words is "twenty-three million, four hundred twenty thousand, five hundred sixty-three".