18318363634128 has 40 divisors (see below), whose sum is σ = 47325567541248. Its totient is φ = 6105717578752.

The previous prime is 18318363634121. The next prime is 18318363634177. The reversal of 18318363634128 is 82143636381381.

It is a super-3 number, since 3×18318363634128³ (a number of 41 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18318363634121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11879376 + ... + 13332527.

Almost surely, 2^{18318363634128} is an apocalyptic number.

It is an amenable number.

18318363634128 is an abundant number, since it is smaller than the sum of its proper divisors (29007203907120).

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

18318363634128 is a wasteful number, since it uses less digits than its factorization.

18318363634128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25227051 (or 25227045 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 57.

The spelling of 18318363634128 in words is "eighteen trillion, three hundred eighteen billion, three hundred sixty-three million, six hundred thirty-four thousand, one hundred twenty-eight".