18130355944 has 16 divisors (see below), whose sum is σ = 34067217600. Its totient is φ = 9045764592.

The previous prime is 18130355941. The next prime is 18130355987. The reversal of 18130355944 is 44955303181.

It is a super-2 number, since 2×18130355944² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18130355944.

It is not an unprimeable number, because it can be changed into a prime (18130355941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2422704 + ... + 2430175.

It is an arithmetic number, because the mean of its divisors is an integer number (2129201100).

Almost surely, 2^18130355944 is an apocalyptic number.

It is an amenable number.

18130355944 is a deficient number, since it is larger than the sum of its proper divisors (15936861656).

18130355944 is a wasteful number, since it uses less digits than its factorization.

18130355944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853352 (or 4853348 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 18130355944 in words is "eighteen billion, one hundred thirty million, three hundred fifty-five thousand, nine hundred forty-four".