18409830280 has 32 divisors (see below), whose sum is σ = 41435121600. Its totient is φ = 7361620416.

The previous prime is 18409830277. The next prime is 18409830289. The reversal of 18409830280 is 8203890481.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18409830289) by changing a digit.

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, 59749 + ... + 200971.

It is an arithmetic number, because the mean of its divisors is an integer number (1294847550).

Almost surely, 2^18409830280 is an apocalyptic number.

18409830280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18409830280 is an abundant number, since it is smaller than the sum of its proper divisors (23025291320).

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

18409830280 is a wasteful number, since it uses less digits than its factorization.

18409830280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144493 (or 144489 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 18409830280 in words is "eighteen billion, four hundred nine million, eight hundred thirty thousand, two hundred eighty".