20127771747177 has 8 divisors (see below), whose sum is σ = 26891686898400. Its totient is φ = 13391185547040.

The previous prime is 20127771747173. The next prime is 20127771747191. The reversal of 20127771747177 is 77174717772102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20127771747177 - 2² = 20127771747173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20127771747177.

It is not an unprimeable number, because it can be changed into a prime (20127771747173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6832236052 + ... + 6832238997.

It is an arithmetic number, because the mean of its divisors is an integer number (3361460862300).

Almost surely, 2^{20127771747177} is an apocalyptic number.

It is an amenable number.

20127771747177 is a deficient number, since it is larger than the sum of its proper divisors (6763915151223).

20127771747177 is a wasteful number, since it uses less digits than its factorization.

20127771747177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13664475543.

The product of its (nonzero) digits is 13176688, while the sum is 60.

The spelling of 20127771747177 in words is "twenty trillion, one hundred twenty-seven billion, seven hundred seventy-one million, seven hundred forty-seven thousand, one hundred seventy-seven".