18118996560 has 360 divisors, whose sum is σ = 73072037376. Its totient is φ = 4007646720.

The previous prime is 18118996537. The next prime is 18118996561. The reversal of 18118996560 is 6569981181.

It is a tau number, because it is divible by the number of its divisors (360).

It is a junction number, because it is equal to n+sod(n) for n = 18118996497 and 18118996506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18118996561) 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 71 ways as a sum of consecutive naturals, for example, 1085397 + ... + 1101963.

Almost surely, 2^18118996560 is an apocalyptic number.

18118996560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18118996560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36536018688).

18118996560 is an abundant number, since it is smaller than the sum of its proper divisors (54953040816).

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

18118996560 is a wasteful number, since it uses less digits than its factorization.

18118996560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16631 (or 16615 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 54.

The spelling of 18118996560 in words is "eighteen billion, one hundred eighteen million, nine hundred ninety-six thousand, five hundred sixty".