20127678271 has 4 divisors (see below), whose sum is σ = 20147867512. Its totient is φ = 20107489032.

The previous prime is 20127678239. The next prime is 20127678283. The reversal of 20127678271 is 17287672102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20127678271 - 2⁵ = 20127678239 is a prime.

It is a super-3 number, since 3×20127678271³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20127678371) 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, 10093125 + ... + 10095118.

It is an arithmetic number, because the mean of its divisors is an integer number (5036966878).

Almost surely, 2^20127678271 is an apocalyptic number.

20127678271 is a deficient number, since it is larger than the sum of its proper divisors (20189241).

20127678271 is an equidigital number, since it uses as much as digits as its factorization.

20127678271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20189240.

The product of its (nonzero) digits is 131712, while the sum is 43.

The spelling of 20127678271 in words is "twenty billion, one hundred twenty-seven million, six hundred seventy-eight thousand, two hundred seventy-one".