8021373813 has 32 divisors (see below), whose sum is σ = 12301430400. Its totient is φ = 5159766528.

The previous prime is 8021373793. The next prime is 8021373853. The reversal of 8021373813 is 3183731208.

It is not a de Polignac number, because 8021373813 - 2⁶ = 8021373749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8021373853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1777506 + ... + 1782012.

It is an arithmetic number, because the mean of its divisors is an integer number (384419700).

Almost surely, 2^8021373813 is an apocalyptic number.

It is an amenable number.

8021373813 is a deficient number, since it is larger than the sum of its proper divisors (4280056587).

8021373813 is a wasteful number, since it uses less digits than its factorization.

8021373813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6818 (or 6812 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 8021373813 is about 89562.1226467975. The cubic root of 8021373813 is about 2001.7795671840.

The spelling of 8021373813 in words is "eight billion, twenty-one million, three hundred seventy-three thousand, eight hundred thirteen".