8021540683 has 8 divisors (see below), whose sum is σ = 8661747248. Its totient is φ = 7384643424.

The previous prime is 8021540663. The next prime is 8021540699. The reversal of 8021540683 is 3860451208.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8021540683 is a prime.

It is a super-2 number, since 2×8021540683² (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 (8021540663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 822285 + ... + 831982.

It is an arithmetic number, because the mean of its divisors is an integer number (1082718406).

Almost surely, 2^8021540683 is an apocalyptic number.

8021540683 is a deficient number, since it is larger than the sum of its proper divisors (640206565).

8021540683 is a wasteful number, since it uses less digits than its factorization.

8021540683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654653.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 8021540683 is about 89563.0542299669. The cubic root of 8021540683 is about 2001.7934482077.

The spelling of 8021540683 in words is "eight billion, twenty-one million, five hundred forty thousand, six hundred eighty-three".