8021732859 has 20 divisors (see below), whose sum is σ = 13694952304. Its totient is φ = 4583847024.

The previous prime is 8021732827. The next prime is 8021732879. The reversal of 8021732859 is 9582371208.

It is a happy number.

It is not a de Polignac number, because 8021732859 - 2⁵ = 8021732827 is a prime.

It is a super-2 number, since 2×8021732859² (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 (8021732809) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7073272 + ... + 7074405.

Almost surely, 2^8021732859 is an apocalyptic number.

8021732859 is a deficient number, since it is larger than the sum of its proper divisors (5673219445).

8021732859 is a wasteful number, since it uses less digits than its factorization.

8021732859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14147696 (or 14147687 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 8021732859 is about 89564.1270766371. The cubic root of 8021732859 is about 2001.8094340638.

The spelling of 8021732859 in words is "eight billion, twenty-one million, seven hundred thirty-two thousand, eight hundred fifty-nine".