27871947020 has 96 divisors (see below), whose sum is σ = 62642227200. Its totient is φ = 10386745344.

The previous prime is 27871947017. The next prime is 27871947031. The reversal of 27871947020 is 2074917872.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6005861 + ... + 6010499.

It is an arithmetic number, because the mean of its divisors is an integer number (652523200).

Almost surely, 2^27871947020 is an apocalyptic number.

27871947020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27871947020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31321113600).

27871947020 is an abundant number, since it is smaller than the sum of its proper divisors (34770280180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27871947020 is a wasteful number, since it uses less digits than its factorization.

27871947020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4927 (or 4925 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 47.

The spelling of 27871947020 in words is "twenty-seven billion, eight hundred seventy-one million, nine hundred forty-seven thousand, twenty".