21600705117 has 16 divisors (see below), whose sum is σ = 29586052160. Its totient is φ = 14008090752.

The previous prime is 21600705083. The next prime is 21600705131. The reversal of 21600705117 is 71150700612.

It is not a de Polignac number, because 21600705117 - 2¹⁰ = 21600704093 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 (21600705157) 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, 531978 + ... + 571140.

It is an arithmetic number, because the mean of its divisors is an integer number (1849128260).

Almost surely, 2^21600705117 is an apocalyptic number.

It is an amenable number.

21600705117 is a deficient number, since it is larger than the sum of its proper divisors (7985347043).

21600705117 is a wasteful number, since it uses less digits than its factorization.

21600705117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44172.

The product of its (nonzero) digits is 2940, while the sum is 30.

The spelling of 21600705117 in words is "twenty-one billion, six hundred million, seven hundred five thousand, one hundred seventeen".