9805149420 has 96 divisors (see below), whose sum is σ = 29990580480. Its totient is φ = 2373807360.

The previous prime is 9805149413. The next prime is 9805149421. The reversal of 9805149420 is 249415089.

9805149420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9805149420² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9805149421) 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 31 ways as a sum of consecutive naturals, for example, 500571 + ... + 519789.

It is an arithmetic number, because the mean of its divisors is an integer number (312401880).

Almost surely, 2^9805149420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9805149420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14995290240).

9805149420 is an abundant number, since it is smaller than the sum of its proper divisors (20185431060).

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

9805149420 is a wasteful number, since it uses less digits than its factorization.

9805149420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20015 (or 20013 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 9805149420 is about 99020.9544490458. The cubic root of 9805149420 is about 2140.3497128423.

The spelling of 9805149420 in words is "nine billion, eight hundred five million, one hundred forty-nine thousand, four hundred twenty".