6831381820 has 12 divisors (see below), whose sum is σ = 14345901864. Its totient is φ = 2732552720.

The previous prime is 6831381793. The next prime is 6831381871. The reversal of 6831381820 is 281831386.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 170784526 + ... + 170784565.

It is an arithmetic number, because the mean of its divisors is an integer number (1195491822).

Almost surely, 2^6831381820 is an apocalyptic number.

It is an amenable number.

6831381820 is an abundant number, since it is smaller than the sum of its proper divisors (7514520044).

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

6831381820 is a wasteful number, since it uses less digits than its factorization.

6831381820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341569100 (or 341569098 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 6831381820 is about 82652.1737161219. The cubic root of 6831381820 is about 1897.4464144132.

The spelling of 6831381820 in words is "six billion, eight hundred thirty-one million, three hundred eighty-one thousand, eight hundred twenty".