8210545820 has 24 divisors (see below), whose sum is σ = 17499494544. Its totient is φ = 3235199616.

The previous prime is 8210545817. The next prime is 8210545823. The reversal of 8210545820 is 285450128.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8210545817) and next prime (8210545823).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8210545823) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3062297 + ... + 3064976.

It is an arithmetic number, because the mean of its divisors is an integer number (729145606).

Almost surely, 2^8210545820 is an apocalyptic number.

It is an amenable number.

8210545820 is an abundant number, since it is smaller than the sum of its proper divisors (9288948724).

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

8210545820 is a wasteful number, since it uses less digits than its factorization.

8210545820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6127349 (or 6127347 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 8210545820 is about 90612.0622213180. The cubic root of 8210545820 is about 2017.3937747687.

Adding to 8210545820 its reverse (285450128), we get a palindrome (8495995948).

The spelling of 8210545820 in words is "eight billion, two hundred ten million, five hundred forty-five thousand, eight hundred twenty".