18307523328 has 72 divisors (see below), whose sum is σ = 48770395968. Its totient is φ = 6096786432.

The previous prime is 18307523323. The next prime is 18307523341. The reversal of 18307523328 is 82332570381.

It is a self number, because there is not a number n which added to its sum of digits gives 18307523328.

It is not an unprimeable number, because it can be changed into a prime (18307523323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851851 + ... + 873077.

Almost surely, 2^18307523328 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 18307523328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24385197984).

18307523328 is an abundant number, since it is smaller than the sum of its proper divisors (30462872640).

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

18307523328 is a wasteful number, since it uses less digits than its factorization.

18307523328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22369 (or 22355 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

It can be divided in two parts, 183075 and 23328, that added together give a triangular number (206403 = T₆₄₂).

The spelling of 18307523328 in words is "eighteen billion, three hundred seven million, five hundred twenty-three thousand, three hundred twenty-eight".