9996490021 has 8 divisors (see below), whose sum is σ = 11448414720. Its totient is φ = 8550529008.

The previous prime is 9996490001. The next prime is 9996490039. The reversal of 9996490021 is 1200946999.

9996490021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9996490021 - 2⁹ = 9996489509 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 (9996490001) 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 7 ways as a sum of consecutive naturals, for example, 1487326 + ... + 1494031.

It is an arithmetic number, because the mean of its divisors is an integer number (1431051840).

Almost surely, 2^9996490021 is an apocalyptic number.

It is an amenable number.

9996490021 is a deficient number, since it is larger than the sum of its proper divisors (1451924699).

9996490021 is a wasteful number, since it uses less digits than its factorization.

9996490021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2981843.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 9996490021 is about 99982.4485647356. The cubic root of 9996490021 is about 2154.1825931838.

The spelling of 9996490021 in words is "nine billion, nine hundred ninety-six million, four hundred ninety thousand, twenty-one".