18287350368 has 144 divisors (see below), whose sum is σ = 57643536384. Its totient is φ = 5056369920.

The previous prime is 18287350351. The next prime is 18287350429. The reversal of 18287350368 is 86305378281.

It is a self number, because there is not a number n which added to its sum of digits gives 18287350368.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83121 + ... + 208527.

It is an arithmetic number, because the mean of its divisors is an integer number (400302336).

Almost surely, 2^18287350368 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 18287350368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28821768192).

18287350368 is an abundant number, since it is smaller than the sum of its proper divisors (39356186016).

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

18287350368 is a wasteful number, since it uses less digits than its factorization.

18287350368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125465 (or 125450 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 18287350368 in words is "eighteen billion, two hundred eighty-seven million, three hundred fifty thousand, three hundred sixty-eight".