8302730021 has 4 divisors (see below), whose sum is σ = 8305483200. Its totient is φ = 8299976844.

The previous prime is 8302729951. The next prime is 8302730039. The reversal of 8302730021 is 1200372038.

8302730021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1200372038 = 2 ⋅600186019.

It is a cyclic number.

It is not a de Polignac number, because 8302730021 - 2²⁶ = 8235621157 is a prime.

It is a super-2 number, since 2×8302730021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8302736021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1372061 + ... + 1378098.

It is an arithmetic number, because the mean of its divisors is an integer number (2076370800).

Almost surely, 2^8302730021 is an apocalyptic number.

It is an amenable number.

8302730021 is a deficient number, since it is larger than the sum of its proper divisors (2753179).

8302730021 is a wasteful number, since it uses less digits than its factorization.

8302730021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2753178.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 8302730021 is about 91119.3174963465. The cubic root of 8302730021 is about 2024.9158138857.

The spelling of 8302730021 in words is "eight billion, three hundred two million, seven hundred thirty thousand, twenty-one".