18130605816 has 32 divisors (see below), whose sum is σ = 46889499600. Its totient is φ = 5835137280.

The previous prime is 18130605803. The next prime is 18130605821. The reversal of 18130605816 is 61850603181.

It is a super-3 number, since 3×18130605816³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

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, 13024165 + ... + 13025556.

Almost surely, 2^18130605816 is an apocalyptic number.

It is an amenable number.

18130605816 is an abundant number, since it is smaller than the sum of its proper divisors (28758893784).

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

18130605816 is a wasteful number, since it uses less digits than its factorization.

18130605816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26049759 (or 26049755 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 18130605816 in words is "eighteen billion, one hundred thirty million, six hundred five thousand, eight hundred sixteen".