18130815240 has 64 divisors (see below), whose sum is σ = 54548424000. Its totient is φ = 4821019392.

The previous prime is 18130815191. The next prime is 18130815251. The reversal of 18130815240 is 4251803181.

It is a super-2 number, since 2×18130815240² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174582 + ... + 258341.

It is an arithmetic number, because the mean of its divisors is an integer number (852319125).

Almost surely, 2^18130815240 is an apocalyptic number.

18130815240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18130815240 is an abundant number, since it is smaller than the sum of its proper divisors (36417608760).

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

18130815240 is a wasteful number, since it uses less digits than its factorization.

18130815240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433286 (or 433282 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The spelling of 18130815240 in words is "eighteen billion, one hundred thirty million, eight hundred fifteen thousand, two hundred forty".