17855808852 has 96 divisors (see below), whose sum is σ = 48570762240. Its totient is φ = 4999841280.

The previous prime is 17855808829. The next prime is 17855808857. The reversal of 17855808852 is 25880855871.

It is a junction number, because it is equal to n+sod(n) for n = 17855808792 and 17855808801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17855808857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1664827 + ... + 1675517.

It is an arithmetic number, because the mean of its divisors is an integer number (505945440).

Almost surely, 2^17855808852 is an apocalyptic number.

17855808852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 17855808852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24285381120).

17855808852 is an abundant number, since it is smaller than the sum of its proper divisors (30714953388).

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

17855808852 is a wasteful number, since it uses less digits than its factorization.

17855808852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11101 (or 11099 counting only the distinct ones).

The product of its (nonzero) digits is 7168000, while the sum is 57.

The spelling of 17855808852 in words is "seventeen billion, eight hundred fifty-five million, eight hundred eight thousand, eight hundred fifty-two".