27731670220 has 12 divisors (see below), whose sum is σ = 58236507504. Its totient is φ = 11092668080.

The previous prime is 27731670199. The next prime is 27731670269. The reversal of 27731670220 is 2207613772.

It is a self number, because there is not a number n which added to its sum of digits gives 27731670220.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693291736 + ... + 693291775.

It is an arithmetic number, because the mean of its divisors is an integer number (4853042292).

Almost surely, 2^27731670220 is an apocalyptic number.

27731670220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27731670220 is an abundant number, since it is smaller than the sum of its proper divisors (30504837284).

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

27731670220 is a wasteful number, since it uses less digits than its factorization.

27731670220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386583520 (or 1386583518 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 37.

The spelling of 27731670220 in words is "twenty-seven billion, seven hundred thirty-one million, six hundred seventy thousand, two hundred twenty".