18304382020 has 24 divisors (see below), whose sum is σ = 38441743704. Its totient is φ = 7321268736.

The previous prime is 18304382011. The next prime is 18304382021. The reversal of 18304382020 is 2028340381.

It can be written as a sum of positive squares in 4 ways, for example, as 11229217024 + 7075164996 = 105968^2 + 84114^2 .

It is a super-2 number, since 2×18304382020² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18304382021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582142 + ... + 612778.

It is an arithmetic number, because the mean of its divisors is an integer number (1601739321).

Almost surely, 2^18304382020 is an apocalyptic number.

18304382020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18304382020 is an abundant number, since it is smaller than the sum of its proper divisors (20137361684).

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

18304382020 is a wasteful number, since it uses less digits than its factorization.

18304382020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60519 (or 60517 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 18304382020 in words is "eighteen billion, three hundred four million, three hundred eighty-two thousand, twenty".