21300024017 has 2 divisors, whose sum is σ = 21300024018. Its totient is φ = 21300024016.

The previous prime is 21300024007. The next prime is 21300024049. The reversal of 21300024017 is 71042000312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15176022481 + 6124001536 = 123191^2 + 78256^2 .

It is a cyclic number.

It is not a de Polignac number, because 21300024017 - 2⁴ = 21300024001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21300024017.

It is not a weakly prime, because it can be changed into another prime (21300024007) 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, 10650012008 + 10650012009.

It is an arithmetic number, because the mean of its divisors is an integer number (10650012009).

Almost surely, 2^21300024017 is an apocalyptic number.

It is an amenable number.

21300024017 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300024017 is an equidigital number, since it uses as much as digits as its factorization.

21300024017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

Adding to 21300024017 its reverse (71042000312), we get a palindrome (92342024329).

The spelling of 21300024017 in words is "twenty-one billion, three hundred million, twenty-four thousand, seventeen".