20716170705 has 12 divisors (see below), whose sum is σ = 35908029300. Its totient is φ = 11048624352.

The previous prime is 20716170697. The next prime is 20716170751. The reversal of 20716170705 is 50707161702.

It can be written as a sum of positive squares in 2 ways, for example, as 5296491729 + 15419678976 = 72777^2 + 124176^2 .

It is not a de Polignac number, because 20716170705 - 2³ = 20716170697 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20716170705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230179630 + ... + 230179719.

It is an arithmetic number, because the mean of its divisors is an integer number (2992335775).

Almost surely, 2^20716170705 is an apocalyptic number.

It is an amenable number.

20716170705 is a deficient number, since it is larger than the sum of its proper divisors (15191858595).

20716170705 is a wasteful number, since it uses less digits than its factorization.

20716170705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460359360 (or 460359357 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 36.

The spelling of 20716170705 in words is "twenty billion, seven hundred sixteen million, one hundred seventy thousand, seven hundred five".