27712171020 has 48 divisors (see below), whose sum is σ = 79245024768. Its totient is φ = 7232679360.

The previous prime is 27712171007. The next prime is 27712171021. The reversal of 27712171020 is 2017121772.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (27712171021) 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, 4910686 + ... + 4916325.

It is an arithmetic number, because the mean of its divisors is an integer number (1650938016).

Almost surely, 2^27712171020 is an apocalyptic number.

27712171020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27712171020 is an abundant number, since it is smaller than the sum of its proper divisors (51532853748).

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

27712171020 is a wasteful number, since it uses less digits than its factorization.

27712171020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9827070 (or 9827068 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 30.

Adding to 27712171020 its reverse (2017121772), we get a palindrome (29729292792).

The spelling of 27712171020 in words is "twenty-seven billion, seven hundred twelve million, one hundred seventy-one thousand, twenty".