9905831020 has 48 divisors (see below), whose sum is σ = 21720817440. Its totient is φ = 3789922304.

The previous prime is 9905831011. The next prime is 9905831027. The reversal of 9905831020 is 201385099.

It is a super-3 number, since 3×9905831020³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (9905831027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17749 + ... + 141868.

It is an arithmetic number, because the mean of its divisors is an integer number (452517030).

Almost surely, 2^9905831020 is an apocalyptic number.

It is an amenable number.

9905831020 is an abundant number, since it is smaller than the sum of its proper divisors (11814986420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9905831020 is a wasteful number, since it uses less digits than its factorization.

9905831020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159762 (or 159760 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 9905831020 is about 99528.0413752828. The cubic root of 9905831020 is about 2147.6506531559.

The spelling of 9905831020 in words is "nine billion, nine hundred five million, eight hundred thirty-one thousand, twenty".