18409371680 has 96 divisors (see below), whose sum is σ = 51419370240. Its totient is φ = 6094126080.

The previous prime is 18409371679. The next prime is 18409371683. The reversal of 18409371680 is 8617390481.

It is not an unprimeable number, because it can be changed into a prime (18409371683) 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 15 ways as a sum of consecutive naturals, for example, 250916 + ... + 315875.

It is an arithmetic number, because the mean of its divisors is an integer number (535618440).

Almost surely, 2^18409371680 is an apocalyptic number.

18409371680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18409371680 is an abundant number, since it is smaller than the sum of its proper divisors (33009998560).

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

18409371680 is a wasteful number, since it uses less digits than its factorization.

18409371680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566842 (or 566834 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 47.

The spelling of 18409371680 in words is "eighteen billion, four hundred nine million, three hundred seventy-one thousand, six hundred eighty".