820674020 has 12 divisors (see below), whose sum is σ = 1723415484. Its totient is φ = 328269600.

The previous prime is 820674007. The next prime is 820674047. The reversal of 820674020 is 20476028.

It can be written as a sum of positive squares in 2 ways, for example, as 608214244 + 212459776 = 24662^2 + 14576^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20516831 + ... + 20516870.

It is an arithmetic number, because the mean of its divisors is an integer number (143617957).

Almost surely, 2^820674020 is an apocalyptic number.

It is an amenable number.

820674020 is an abundant number, since it is smaller than the sum of its proper divisors (902741464).

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

820674020 is a wasteful number, since it uses less digits than its factorization.

820674020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41033710 (or 41033708 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 820674020 is about 28647.4086088079. The cubic root of 820674020 is about 936.2465457748.

The spelling of 820674020 in words is "eight hundred twenty million, six hundred seventy-four thousand, twenty".