20656600115705 has 8 divisors (see below), whose sum is σ = 24791193381192. Its totient is φ = 16523097931008.

The previous prime is 20656600115699. The next prime is 20656600115717. The reversal of 20656600115705 is 50751100665602.

It can be written as a sum of positive squares in 4 ways, for example, as 4246290786409 + 16410309329296 = 2060653^2 + 4050964^2 .

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 20656600115705 - 2⁴ = 20656600115689 is a prime.

It is a Duffinian number.

It is a Curzon 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, 272728544 + ... + 272804273.

It is an arithmetic number, because the mean of its divisors is an integer number (3098899172649).

Almost surely, 2^{20656600115705} is an apocalyptic number.

It is an amenable number.

20656600115705 is a deficient number, since it is larger than the sum of its proper divisors (4134593265487).

20656600115705 is an equidigital number, since it uses as much as digits as its factorization.

20656600115705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545540395.

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 20656600115705 in words is "twenty trillion, six hundred fifty-six billion, six hundred million, one hundred fifteen thousand, seven hundred five".