28341996021 has 12 divisors (see below), whose sum is σ = 41260790272. Its totient is φ = 18745886376.

The previous prime is 28341995999. The next prime is 28341996049. The reversal of 28341996021 is 12069914382.

28341996021 is a `hidden beast` number, since 2 + 8 + 34 + 1 + 9 + 9 + 602 + 1 = 666.

It is not a de Polignac number, because 28341996021 - 2⁹ = 28341995509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28341996421) 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 11 ways as a sum of consecutive naturals, for example, 12396931 + ... + 12399216.

Almost surely, 2^28341996021 is an apocalyptic number.

It is an amenable number.

28341996021 is a deficient number, since it is larger than the sum of its proper divisors (12918794251).

28341996021 is a wasteful number, since it uses less digits than its factorization.

28341996021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24796280 (or 24796277 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 28341996021 in words is "twenty-eight billion, three hundred forty-one million, nine hundred ninety-six thousand, twenty-one".