21717464605 has 8 divisors (see below), whose sum is σ = 26615446272. Its totient is φ = 17004312528.

The previous prime is 21717464597. The next prime is 21717464653. The reversal of 21717464605 is 50646471712.

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 21717464605 - 2³ = 21717464597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46207137 + ... + 46207606.

It is an arithmetic number, because the mean of its divisors is an integer number (3326930784).

Almost surely, 2^21717464605 is an apocalyptic number.

It is an amenable number.

21717464605 is a deficient number, since it is larger than the sum of its proper divisors (4897981667).

21717464605 is an equidigital number, since it uses as much as digits as its factorization.

21717464605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92414795.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 21717464605 in words is "twenty-one billion, seven hundred seventeen million, four hundred sixty-four thousand, six hundred five".