21703579703423 has 8 divisors (see below), whose sum is σ = 21712906222128. Its totient is φ = 21694253618304.

The previous prime is 21703579703417. The next prime is 21703579703479. The reversal of 21703579703423 is 32430797530712.

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 21703579703423 - 2¹⁸ = 21703579441279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21703579703023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136427015 + ... + 136586007.

It is an arithmetic number, because the mean of its divisors is an integer number (2714113277766).

Almost surely, 2^{21703579703423} is an apocalyptic number.

21703579703423 is a deficient number, since it is larger than the sum of its proper divisors (9326518705).

21703579703423 is a wasteful number, since it uses less digits than its factorization.

21703579703423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216793.

The product of its (nonzero) digits is 6667920, while the sum is 53.

The spelling of 21703579703423 in words is "twenty-one trillion, seven hundred three billion, five hundred seventy-nine million, seven hundred three thousand, four hundred twenty-three".