8020432899721 has 16 divisors (see below), whose sum is σ = 8816365928448. Its totient is φ = 7235840237200.

The previous prime is 8020432899691. The next prime is 8020432899863. The reversal of 8020432899721 is 1279982340208.

It is a cyclic number.

It is not a de Polignac number, because 8020432899721 - 2²¹ = 8020430802569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8020432897721) 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 15 ways as a sum of consecutive naturals, for example, 4387465 + ... + 5940598.

It is an arithmetic number, because the mean of its divisors is an integer number (551022870528).

Almost surely, 2^{8020432899721} is an apocalyptic number.

It is an amenable number.

8020432899721 is a deficient number, since it is larger than the sum of its proper divisors (795933028727).

8020432899721 is a wasteful number, since it uses less digits than its factorization.

8020432899721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10328612.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 8020432899721 in words is "eight trillion, twenty billion, four hundred thirty-two million, eight hundred ninety-nine thousand, seven hundred twenty-one".