18318130944 has 144 divisors (see below), whose sum is σ = 49536748800. Its totient is φ = 6008578048.

The previous prime is 18318130937. The next prime is 18318130951. The reversal of 18318130944 is 44903181381.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18318130937) and next prime (18318130951).

It is a super-2 number, since 2×18318130944² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18318130896 and 18318130905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17976067 + ... + 17977085.

It is an arithmetic number, because the mean of its divisors is an integer number (344005200).

Almost surely, 2^18318130944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18318130944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24768374400).

18318130944 is an abundant number, since it is smaller than the sum of its proper divisors (31218617856).

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

18318130944 is a wasteful number, since it uses less digits than its factorization.

18318130944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390 (or 1376 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 18318130944 in words is "eighteen billion, three hundred eighteen million, one hundred thirty thousand, nine hundred forty-four".