8520235813 has 4 divisors (see below), whose sum is σ = 8527823968. Its totient is φ = 8512647660.

The previous prime is 8520235783. The next prime is 8520235837. The reversal of 8520235813 is 3185320258.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8520235813 - 2¹³ = 8520227621 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 (8520235613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3792393 + ... + 3794638.

It is an arithmetic number, because the mean of its divisors is an integer number (2131955992).

Almost surely, 2^8520235813 is an apocalyptic number.

It is an amenable number.

8520235813 is a deficient number, since it is larger than the sum of its proper divisors (7588155).

8520235813 is a wasteful number, since it uses less digits than its factorization.

8520235813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7588154.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 8520235813 is about 92305.1234385178. The cubic root of 8520235813 is about 2042.4457892184.

The spelling of 8520235813 in words is "eight billion, five hundred twenty million, two hundred thirty-five thousand, eight hundred thirteen".