21703645303 has 4 divisors (see below), whose sum is σ = 21841885240. Its totient is φ = 21565405368.

The previous prime is 21703645283. The next prime is 21703645331. The reversal of 21703645303 is 30354630712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21703645303 - 2⁹ = 21703644791 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 (21703645363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69119733 + ... + 69120046.

It is an arithmetic number, because the mean of its divisors is an integer number (5460471310).

Almost surely, 2^21703645303 is an apocalyptic number.

21703645303 is a deficient number, since it is larger than the sum of its proper divisors (138239937).

21703645303 is a wasteful number, since it uses less digits than its factorization.

21703645303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138239936.

The product of its (nonzero) digits is 45360, while the sum is 34.

The spelling of 21703645303 in words is "twenty-one billion, seven hundred three million, six hundred forty-five thousand, three hundred three".