21703668223 has 2 divisors, whose sum is σ = 21703668224. Its totient is φ = 21703668222.

The previous prime is 21703668211. The next prime is 21703668241. The reversal of 21703668223 is 32286630712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21703668223 - 2¹³ = 21703660031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21703668263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10851834111 + 10851834112.

It is an arithmetic number, because the mean of its divisors is an integer number (10851834112).

Almost surely, 2^21703668223 is an apocalyptic number.

21703668223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21703668223 is an equidigital number, since it uses as much as digits as its factorization.

21703668223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 21703668223 in words is "twenty-one billion, seven hundred three million, six hundred sixty-eight thousand, two hundred twenty-three".