8236942021 has 12 divisors (see below), whose sum is σ = 10347234016. Its totient is φ = 6418395720.

The previous prime is 8236942009. The next prime is 8236942039. The reversal of 8236942021 is 1202496328.

It is a happy number.

It is not a de Polignac number, because 8236942021 - 2⁵ = 8236941989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8236942001) 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 11 ways as a sum of consecutive naturals, for example, 4861575 + ... + 4863268.

Almost surely, 2^8236942021 is an apocalyptic number.

It is an amenable number.

8236942021 is a deficient number, since it is larger than the sum of its proper divisors (2110291995).

8236942021 is a wasteful number, since it uses less digits than its factorization.

8236942021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9724872 (or 9724861 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 8236942021 is about 90757.6003484006. The cubic root of 8236942021 is about 2019.5533781242.

The spelling of 8236942021 in words is "eight billion, two hundred thirty-six million, nine hundred forty-two thousand, twenty-one".