8020327081 has 4 divisors (see below), whose sum is σ = 8637275332. Its totient is φ = 7403378832.

The previous prime is 8020327061. The next prime is 8020327109. The reversal of 8020327081 is 1807230208.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4904901225 + 3115425856 = 70035^2 + 55816^2 .

It is a cyclic number.

It is not a de Polignac number, because 8020327081 - 2⁷ = 8020326953 is a prime.

It is a super-2 number, since 2×8020327081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8020327061) 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, 308474106 + ... + 308474131.

It is an arithmetic number, because the mean of its divisors is an integer number (2159318833).

Almost surely, 2^8020327081 is an apocalyptic number.

It is an amenable number.

8020327081 is a deficient number, since it is larger than the sum of its proper divisors (616948251).

8020327081 is a wasteful number, since it uses less digits than its factorization.

8020327081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616948250.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 8020327081 is about 89556.2788474376. The cubic root of 8020327081 is about 2001.6924907502.

Adding to 8020327081 its reverse (1807230208), we get a palindrome (9827557289).

The spelling of 8020327081 in words is "eight billion, twenty million, three hundred twenty-seven thousand, eighty-one".