21703868535 has 8 divisors (see below), whose sum is σ = 34726189680. Its totient is φ = 11575396544.

The previous prime is 21703868497. The next prime is 21703868573. The reversal of 21703868535 is 53586830712.

It is an interprime number because it is at equal distance from previous prime (21703868497) and next prime (21703868573).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21703868535 - 2¹⁰ = 21703867511 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 723462270 + ... + 723462299.

It is an arithmetic number, because the mean of its divisors is an integer number (4340773710).

Almost surely, 2^21703868535 is an apocalyptic number.

21703868535 is a deficient number, since it is larger than the sum of its proper divisors (13022321145).

21703868535 is a wasteful number, since it uses less digits than its factorization.

21703868535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446924577.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 21703868535 in words is "twenty-one billion, seven hundred three million, eight hundred sixty-eight thousand, five hundred thirty-five".