20127167712557 has 16 divisors (see below), whose sum is σ = 20649415836672. Its totient is φ = 19610549350080.

The previous prime is 20127167712551. The next prime is 20127167712577. The reversal of 20127167712557 is 75521776172102.

It is a cyclic number.

It is not a de Polignac number, because 20127167712557 - 2⁴ = 20127167712541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20127167712499 and 20127167712508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20127167712551) 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, 4248623 + ... + 7635779.

It is an arithmetic number, because the mean of its divisors is an integer number (1290588489792).

Almost surely, 2^{20127167712557} is an apocalyptic number.

It is an amenable number.

20127167712557 is a deficient number, since it is larger than the sum of its proper divisors (522248124115).

20127167712557 is a wasteful number, since it uses less digits than its factorization.

20127167712557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387988.

The product of its (nonzero) digits is 2881200, while the sum is 53.

The spelling of 20127167712557 in words is "twenty trillion, one hundred twenty-seven billion, one hundred sixty-seven million, seven hundred twelve thousand, five hundred fifty-seven".