18185478150 has 96 divisors (see below), whose sum is σ = 51831325440. Its totient is φ = 4133416320.

The previous prime is 18185478071. The next prime is 18185478169. The reversal of 18185478150 is 5187458181.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18185478150.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 139572 + ... + 236328.

It is an arithmetic number, because the mean of its divisors is an integer number (539909640).

Almost surely, 2^18185478150 is an apocalyptic number.

18185478150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18185478150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25915662720).

18185478150 is an abundant number, since it is smaller than the sum of its proper divisors (33645847290).

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

18185478150 is a wasteful number, since it uses less digits than its factorization.

18185478150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96958 (or 96953 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 48.

The spelling of 18185478150 in words is "eighteen billion, one hundred eighty-five million, four hundred seventy-eight thousand, one hundred fifty".