9835674378021 has 56 divisors (see below), whose sum is σ = 15259622378880. Its totient is φ = 6329204523936.

The previous prime is 9835674378011. The next prime is 9835674378041. The reversal of 9835674378021 is 1208734765389.

9835674378021 is a `hidden beast` number, since 9 + 8 + 3 + 567 + 43 + 7 + 8 + 0 + 21 = 666.

It is not a de Polignac number, because 9835674378021 - 2¹¹ = 9835674375973 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9835674378021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9835674378011) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 76191096 + ... + 76320078.

It is a 2-persistent number, because it is pandigital, and so is 2⋅9835674378021 = 19671348756042, but 3⋅9835674378021 = 29507023134063 is not.

Almost surely, 2^{9835674378021} is an apocalyptic number.

It is an amenable number.

9835674378021 is a deficient number, since it is larger than the sum of its proper divisors (5423948000859).

9835674378021 is a wasteful number, since it uses less digits than its factorization.

9835674378021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132637 (or 132622 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 63.

The spelling of 9835674378021 in words is "nine trillion, eight hundred thirty-five billion, six hundred seventy-four million, three hundred seventy-eight thousand, twenty-one".