9842820885 has 12 divisors (see below), whose sum is σ = 17060889612. Its totient is φ = 5249504448.

The previous prime is 9842820839. The next prime is 9842820901. The reversal of 9842820885 is 5880282489.

It is a happy number.

9842820885 is a `hidden beast` number, since 9 + 8 + 428 + 208 + 8 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7727464836 + 2115356049 = 87906^2 + 45993^2 .

It is not a de Polignac number, because 9842820885 - 2⁶ = 9842820821 is a prime.

It is a super-2 number, since 2×9842820885² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109364632 + ... + 109364721.

It is an arithmetic number, because the mean of its divisors is an integer number (1421740801).

Almost surely, 2^9842820885 is an apocalyptic number.

It is an amenable number.

9842820885 is a deficient number, since it is larger than the sum of its proper divisors (7218068727).

9842820885 is a wasteful number, since it uses less digits than its factorization.

9842820885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218729364 (or 218729361 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 54.

The square root of 9842820885 is about 99210.9917549462. The cubic root of 9842820885 is about 2143.0872903189.

The spelling of 9842820885 in words is "nine billion, eight hundred forty-two million, eight hundred twenty thousand, eight hundred eighty-five".