21824361563 has 2 divisors, whose sum is σ = 21824361564. Its totient is φ = 21824361562.

The previous prime is 21824361557. The next prime is 21824361589. The reversal of 21824361563 is 36516342812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21824361563 - 2¹⁶ = 21824296027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21824361563.

It is not a weakly prime, because it can be changed into another prime (21824361763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10912180781 + 10912180782.

It is an arithmetic number, because the mean of its divisors is an integer number (10912180782).

Almost surely, 2^21824361563 is an apocalyptic number.

21824361563 is a deficient number, since it is larger than the sum of its proper divisors (1).

21824361563 is an equidigital number, since it uses as much as digits as its factorization.

21824361563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 41.

The spelling of 21824361563 in words is "twenty-one billion, eight hundred twenty-four million, three hundred sixty-one thousand, five hundred sixty-three".