8470535021 has 12 divisors (see below), whose sum is σ = 9180143028. Its totient is φ = 7812215424.

The previous prime is 8470535011. The next prime is 8470535057. The reversal of 8470535021 is 1205350748.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 529230025 + 7941304996 = 23005^2 + 89114^2 .

It is not a de Polignac number, because 8470535021 - 2³⁰ = 7396793197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8470535011) 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 11 ways as a sum of consecutive naturals, for example, 180611 + ... + 222623.

It is an arithmetic number, because the mean of its divisors is an integer number (765011919).

Almost surely, 2^8470535021 is an apocalyptic number.

It is an amenable number.

8470535021 is a deficient number, since it is larger than the sum of its proper divisors (709608007).

8470535021 is a wasteful number, since it uses less digits than its factorization.

8470535021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43232 (or 43219 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 8470535021 is about 92035.5095656019. The cubic root of 8470535021 is about 2038.4666663302.

Adding to 8470535021 its reverse (1205350748), we get a palindrome (9675885769).

The spelling of 8470535021 in words is "eight billion, four hundred seventy million, five hundred thirty-five thousand, twenty-one".