20078716705 has 8 divisors (see below), whose sum is σ = 24116193000. Its totient is φ = 16048484736.

The previous prime is 20078716687. The next prime is 20078716727. The reversal of 20078716705 is 50761787002.

It can be written as a sum of positive squares in 4 ways, for example, as 409495696 + 19669221009 = 20236^2 + 140247^2 .

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 20078716705 - 2¹⁷ = 20078585633 is a prime.

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, 1804980 + ... + 1816069.

It is an arithmetic number, because the mean of its divisors is an integer number (3014524125).

Almost surely, 2^20078716705 is an apocalyptic number.

It is an amenable number.

20078716705 is a deficient number, since it is larger than the sum of its proper divisors (4037476295).

20078716705 is a wasteful number, since it uses less digits than its factorization.

20078716705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622163.

The product of its (nonzero) digits is 164640, while the sum is 43.

The spelling of 20078716705 in words is "twenty billion, seventy-eight million, seven hundred sixteen thousand, seven hundred five".