30853955920 has 20 divisors (see below), whose sum is σ = 71735447700. Its totient is φ = 12341582336.

The previous prime is 30853955917. The next prime is 30853955927. The reversal of 30853955920 is 2955935803.

It can be written as a sum of positive squares in 2 ways, for example, as 10308747024 + 20545208896 = 101532^2 + 143336^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30853955927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192837145 + ... + 192837304.

It is an arithmetic number, because the mean of its divisors is an integer number (3586772385).

Almost surely, 2^30853955920 is an apocalyptic number.

It is an amenable number.

30853955920 is an abundant number, since it is smaller than the sum of its proper divisors (40881491780).

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

30853955920 is a wasteful number, since it uses less digits than its factorization.

30853955920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385674462 (or 385674456 counting only the distinct ones).

The product of its (nonzero) digits is 1458000, while the sum is 49.

The spelling of 30853955920 in words is "thirty billion, eight hundred fifty-three million, nine hundred fifty-five thousand, nine hundred twenty".