681983020 has 12 divisors (see below), whose sum is σ = 1432164384. Its totient is φ = 272793200.

The previous prime is 681982969. The next prime is 681983021. The reversal of 681983020 is 20389186.

It is not an unprimeable number, because it can be changed into a prime (681983021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17049556 + ... + 17049595.

It is an arithmetic number, because the mean of its divisors is an integer number (119347032).

Almost surely, 2^681983020 is an apocalyptic number.

It is an amenable number.

681983020 is an abundant number, since it is smaller than the sum of its proper divisors (750181364).

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

681983020 is a wasteful number, since it uses less digits than its factorization.

681983020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34099160 (or 34099158 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 681983020 is about 26114.8046134755. The cubic root of 681983020 is about 880.2199088839.

The spelling of 681983020 in words is "six hundred eighty-one million, nine hundred eighty-three thousand, twenty".