18307120040 has 64 divisors (see below), whose sum is σ = 44957021760. Its totient is φ = 6653969920.

The previous prime is 18307120009. The next prime is 18307120049. The reversal of 18307120040 is 4002170381.

It is a junction number, because it is equal to n+sod(n) for n = 18307119991 and 18307120009.

It is not an unprimeable number, because it can be changed into a prime (18307120049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1044227 + ... + 1061613.

It is an arithmetic number, because the mean of its divisors is an integer number (702453465).

Almost surely, 2^18307120040 is an apocalyptic number.

18307120040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18307120040 is an abundant number, since it is smaller than the sum of its proper divisors (26649901720).

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

18307120040 is a wasteful number, since it uses less digits than its factorization.

18307120040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19802 (or 19798 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The spelling of 18307120040 in words is "eighteen billion, three hundred seven million, one hundred twenty thousand, forty".