18308185344 has 216 divisors, whose sum is σ = 56375155200. Its totient is φ = 5701570560.

The previous prime is 18308185331. The next prime is 18308185349. The reversal of 18308185344 is 44358180381.

18308185344 is a `hidden beast` number, since 1 + 8 + 30 + 81 + 8 + 534 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 18308185344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18308185349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2066877 + ... + 2075715.

Almost surely, 2^18308185344 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 18308185344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28187577600).

18308185344 is an abundant number, since it is smaller than the sum of its proper divisors (38066969856).

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

18308185344 is a wasteful number, since it uses less digits than its factorization.

18308185344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8921 (or 8904 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 18308185344 in words is "eighteen billion, three hundred eight million, one hundred eighty-five thousand, three hundred forty-four".