18335000018 has 4 divisors (see below), whose sum is σ = 27502500030. Its totient is φ = 9167500008.

The previous prime is 18335000011. The next prime is 18335000023. The reversal of 18335000018 is 81000053381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10728194929 + 7606805089 = 103577^2 + 87217^2 .

It is not an unprimeable number, because it can be changed into a prime (18335000011) by changing a digit.

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 as a sum of consecutive naturals, namely, 4583750003 + ... + 4583750006.

Almost surely, 2^18335000018 is an apocalyptic number.

18335000018 is a deficient number, since it is larger than the sum of its proper divisors (9167500012).

18335000018 is an equidigital number, since it uses as much as digits as its factorization.

18335000018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9167500011.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 18335000018 its reverse (81000053381), we get a palindrome (99335053399).

The spelling of 18335000018 in words is "eighteen billion, three hundred thirty-five million, eighteen", and thus it is an aban number.