21703645363 has 2 divisors, whose sum is σ = 21703645364. Its totient is φ = 21703645362.

The previous prime is 21703645361. The next prime is 21703645367. The reversal of 21703645363 is 36354630712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21703645363 - 2¹ = 21703645361 is a prime.

Together with 21703645361, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21703645361) 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, 10851822681 + 10851822682.

It is an arithmetic number, because the mean of its divisors is an integer number (10851822682).

Almost surely, 2^21703645363 is an apocalyptic number.

21703645363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21703645363 is an equidigital number, since it uses as much as digits as its factorization.

21703645363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 21703645363 in words is "twenty-one billion, seven hundred three million, six hundred forty-five thousand, three hundred sixty-three".