8021533744 has 20 divisors (see below), whose sum is σ = 17761967824. Its totient is φ = 3437800128.

The previous prime is 8021533727. The next prime is 8021533747. The reversal of 8021533744 is 4473351208.

It is a happy number.

It is a super-2 number, since 2×8021533744² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8021533747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35810307 + ... + 35810530.

Almost surely, 2^8021533744 is an apocalyptic number.

It is an amenable number.

8021533744 is an abundant number, since it is smaller than the sum of its proper divisors (9740434080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8021533744 is a wasteful number, since it uses less digits than its factorization.

8021533744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71620852 (or 71620846 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 8021533744 is about 89563.0154918871. The cubic root of 8021533744 is about 2001.7928709932.

The spelling of 8021533744 in words is "eight billion, twenty-one million, five hundred thirty-three thousand, seven hundred forty-four".