18307478930 has 16 divisors (see below), whose sum is σ = 35488344024. Its totient is φ = 6759684480.

The previous prime is 18307478923. The next prime is 18307478971. The reversal of 18307478930 is 3987470381.

It can be written as a sum of positive squares in 4 ways, for example, as 13128805561 + 5178673369 = 114581^2 + 71963^2 .

It is an unprimeable number.

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, 70413251 + ... + 70413510.

Almost surely, 2^18307478930 is an apocalyptic number.

18307478930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18307478930 is a deficient number, since it is larger than the sum of its proper divisors (17180865094).

18307478930 is a wasteful number, since it uses less digits than its factorization.

18307478930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140826781.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 18307478930 in words is "eighteen billion, three hundred seven million, four hundred seventy-eight thousand, nine hundred thirty".