9845420521 has 8 divisors (see below), whose sum is σ = 9946786304. Its totient is φ = 9744166080.

The previous prime is 9845420509. The next prime is 9845420527. The reversal of 9845420521 is 1250245489.

It is a happy number.

9845420521 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 a cyclic number.

It is not a de Polignac number, because 9845420521 - 2⁵ = 9845420489 is a prime.

It is a super-2 number, since 2×9845420521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9845420527) 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, 156136 + ... + 209926.

It is an arithmetic number, because the mean of its divisors is an integer number (1243348288).

Almost surely, 2^9845420521 is an apocalyptic number.

It is an amenable number.

9845420521 is a deficient number, since it is larger than the sum of its proper divisors (101365783).

9845420521 is a wasteful number, since it uses less digits than its factorization.

9845420521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55671.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 9845420521 is about 99224.0924423096. The cubic root of 9845420521 is about 2143.2759474977.

The spelling of 9845420521 in words is "nine billion, eight hundred forty-five million, four hundred twenty thousand, five hundred twenty-one".