820020876 has 24 divisors (see below), whose sum is σ = 1949485104. Its totient is φ = 268182720.

The previous prime is 820020871. The next prime is 820020893. The reversal of 820020876 is 678020028.

It is not an unprimeable number, because it can be changed into a prime (820020871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644035 + ... + 645306.

It is an arithmetic number, because the mean of its divisors is an integer number (81228546).

Almost surely, 2^820020876 is an apocalyptic number.

It is an amenable number.

820020876 is an abundant number, since it is smaller than the sum of its proper divisors (1129464228).

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

820020876 is a wasteful number, since it uses less digits than its factorization.

820020876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289401 (or 1289399 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 820020876 is about 28636.0066350041. The cubic root of 820020876 is about 935.9981052266.

The spelling of 820020876 in words is "eight hundred twenty million, twenty thousand, eight hundred seventy-six".