21703385535 has 16 divisors (see below), whose sum is σ = 37396603104. Its totient is φ = 10684743552.

The previous prime is 21703385513. The next prime is 21703385537. The reversal of 21703385535 is 53558330712.

It is not a de Polignac number, because 21703385535 - 2⁶ = 21703385471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21703385537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55649512 + ... + 55649901.

It is an arithmetic number, because the mean of its divisors is an integer number (2337287694).

Almost surely, 2^21703385535 is an apocalyptic number.

21703385535 is a deficient number, since it is larger than the sum of its proper divisors (15693217569).

21703385535 is a wasteful number, since it uses less digits than its factorization.

21703385535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111299434.

The product of its (nonzero) digits is 378000, while the sum is 42.

The spelling of 21703385535 in words is "twenty-one billion, seven hundred three million, three hundred eighty-five thousand, five hundred thirty-five".