820020700 has 36 divisors (see below), whose sum is σ = 1793057112. Its totient is φ = 325499200.

The previous prime is 820020683. The next prime is 820020701. The reversal of 820020700 is 7020028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820020701) 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 11 ways as a sum of consecutive naturals, for example, 18199 + ... + 44398.

It is an arithmetic number, because the mean of its divisors is an integer number (49807142).

Almost surely, 2^820020700 is an apocalyptic number.

It is an amenable number.

820020700 is an abundant number, since it is smaller than the sum of its proper divisors (973036412).

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

820020700 is a wasteful number, since it uses less digits than its factorization.

820020700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62742 (or 62735 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 820020700 is about 28636.0035619498. The cubic root of 820020700 is about 935.9980382626.

Adding to 820020700 its reverse (7020028), we get a palindrome (827040728).

It can be divided in two parts, 8200 and 20700, that added together give a square (28900 = 170²).

The spelling of 820020700 in words is "eight hundred twenty million, twenty thousand, seven hundred".