18383820020 has 24 divisors (see below), whose sum is σ = 38988264168. Its totient is φ = 7280720000.

The previous prime is 18383820019. The next prime is 18383820047. The reversal of 18383820020 is 2002838381.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10815168016 + 7568652004 = 103996^2 + 86998^2 .

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4548431 + ... + 4552470.

It is an arithmetic number, because the mean of its divisors is an integer number (1624511007).

Almost surely, 2^18383820020 is an apocalyptic number.

18383820020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18383820020 is an abundant number, since it is smaller than the sum of its proper divisors (20604444148).

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

18383820020 is a wasteful number, since it uses less digits than its factorization.

18383820020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9101011 (or 9101009 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 18383820020 in words is "eighteen billion, three hundred eighty-three million, eight hundred twenty thousand, twenty".