18820305160 has 64 divisors (see below), whose sum is σ = 43829780400. Its totient is φ = 7264567296.

The previous prime is 18820305137. The next prime is 18820305187. The reversal of 18820305160 is 6150302881.

It can be written as a sum of positive squares in 8 ways, for example, as 15263614116 + 3556691044 = 123546^2 + 59638^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3004752 + ... + 3011008.

Almost surely, 2^18820305160 is an apocalyptic number.

18820305160 is a gapful number since it is divisible by the number (10) 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 18820305160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21914890200).

18820305160 is an abundant number, since it is smaller than the sum of its proper divisors (25009475240).

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

18820305160 is a wasteful number, since it uses less digits than its factorization.

18820305160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8890 (or 8886 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The spelling of 18820305160 in words is "eighteen billion, eight hundred twenty million, three hundred five thousand, one hundred sixty".