9804839421 has 32 divisors (see below), whose sum is σ = 14377587840. Its totient is φ = 5906534400.

The previous prime is 9804839413. The next prime is 9804839537. The reversal of 9804839421 is 1249384089.

It is not a de Polignac number, because 9804839421 - 2³ = 9804839413 is a prime.

It is a super-2 number, since 2×9804839421² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9804839411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 545701 + ... + 563381.

It is an arithmetic number, because the mean of its divisors is an integer number (449299620).

Almost surely, 2^9804839421 is an apocalyptic number.

It is an amenable number.

9804839421 is a deficient number, since it is larger than the sum of its proper divisors (4572748419).

9804839421 is a wasteful number, since it uses less digits than its factorization.

9804839421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17997.

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 9804839421 is about 99019.3891164756. The cubic root of 9804839421 is about 2140.3271562163.

The spelling of 9804839421 in words is "nine billion, eight hundred four million, eight hundred thirty-nine thousand, four hundred twenty-one".