18307550338 has 32 divisors (see below), whose sum is σ = 35072569728. Its totient is φ = 6958838400.

The previous prime is 18307550333. The next prime is 18307550369. The reversal of 18307550338 is 83305570381.

It is a junction number, because it is equal to n+sod(n) for n = 18307550294 and 18307550303.

It is not an unprimeable number, because it can be changed into a prime (18307550333) by changing a digit.

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, 1443445 + ... + 1456072.

It is an arithmetic number, because the mean of its divisors is an integer number (1096017804).

Almost surely, 2^18307550338 is an apocalyptic number.

18307550338 is a deficient number, since it is larger than the sum of its proper divisors (16765019390).

18307550338 is a wasteful number, since it uses less digits than its factorization.

18307550338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899578.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 18307550338 in words is "eighteen billion, three hundred seven million, five hundred fifty thousand, three hundred thirty-eight".