27730481820 has 24 divisors (see below), whose sum is σ = 77645349264. Its totient is φ = 7394795136.

The previous prime is 27730481813. The next prime is 27730481827. The reversal of 27730481820 is 2818403772.

It is an interprime number because it is at equal distance from previous prime (27730481813) and next prime (27730481827).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27730481827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231087289 + ... + 231087408.

It is an arithmetic number, because the mean of its divisors is an integer number (3235222886).

Almost surely, 2^27730481820 is an apocalyptic number.

27730481820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27730481820 is an abundant number, since it is smaller than the sum of its proper divisors (49914867444).

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

27730481820 is a wasteful number, since it uses less digits than its factorization.

27730481820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462174709 (or 462174707 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The spelling of 27730481820 in words is "twenty-seven billion, seven hundred thirty million, four hundred eighty-one thousand, eight hundred twenty".