20115171706016 has 24 divisors (see below), whose sum is σ = 39603558855924. Its totient is φ = 10057125012480.

The previous prime is 20115171706013. The next prime is 20115171706031. The reversal of 20115171706016 is 61060717151102.

It can be written as a sum of positive squares in 2 ways, for example, as 15533088969616 + 4582082736400 = 3941204^2 + 2140580^2 .

It is not an unprimeable number, because it can be changed into a prime (20115171706013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13691435 + ... + 15089258.

Almost surely, 2^{20115171706016} is an apocalyptic number.

It is an amenable number.

20115171706016 is a deficient number, since it is larger than the sum of its proper divisors (19488387149908).

20115171706016 is a wasteful number, since it uses less digits than its factorization.

20115171706016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28802544 (or 28802536 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 38.

Adding to 20115171706016 its reverse (61060717151102), we get a palindrome (81175888857118).

The spelling of 20115171706016 in words is "twenty trillion, one hundred fifteen billion, one hundred seventy-one million, seven hundred six thousand, sixteen".