18115300 has 54 divisors (see below), whose sum is σ = 45740562. Its totient is φ = 6209280.

The previous prime is 18115297. The next prime is 18115309. The reversal of 18115300 is 351181.

It can be written as a sum of positive squares in 3 ways, for example, as 1764 + 18113536 = 42^2 + 4256^2 .

It is not an unprimeable number, because it can be changed into a prime (18115309) 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 17 ways as a sum of consecutive naturals, for example, 3052 + ... + 6748.

Almost surely, 2^18115300 is an apocalyptic number.

18115300 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 18115300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22870281).

18115300 is an abundant number, since it is smaller than the sum of its proper divisors (27625262).

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

18115300 is a wasteful number, since it uses less digits than its factorization.

18115300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3725 (or 3711 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 18115300 is about 4256.2072317969. The cubic root of 18115300 is about 262.6325256745.

Adding to 18115300 its reverse (351181), we get a palindrome (18466481).

The spelling of 18115300 in words is "eighteen million, one hundred fifteen thousand, three hundred".