18348362500 has 72 divisors (see below), whose sum is σ = 43222124232. Its totient is φ = 6774720000.

The previous prime is 18348362479. The next prime is 18348362537. The reversal of 18348362500 is 526384381.

It can be written as a sum of positive squares in 12 ways, for example, as 18343451844 + 4910656 = 135438^2 + 2216^2 .

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, 106044 + ... + 218956.

It is an arithmetic number, because the mean of its divisors is an integer number (600307281).

Almost surely, 2^18348362500 is an apocalyptic number.

18348362500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18348362500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21611062116).

18348362500 is an abundant number, since it is smaller than the sum of its proper divisors (24873761732).

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

18348362500 is a wasteful number, since it uses less digits than its factorization.

18348362500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112955 (or 112933 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 18348362500 in words is "eighteen billion, three hundred forty-eight million, three hundred sixty-two thousand, five hundred".