18130500 has 192 divisors, whose sum is σ = 62899200. Its totient is φ = 4492800.

The previous prime is 18130493. The next prime is 18130507. The reversal of 18130500 is 503181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18130493) and next prime (18130507).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (18130507) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 229461 + ... + 229539.

It is an arithmetic number, because the mean of its divisors is an integer number (327600).

Almost surely, 2^18130500 is an apocalyptic number.

18130500 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 18130500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31449600).

18130500 is an abundant number, since it is smaller than the sum of its proper divisors (44768700).

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

18130500 is a wasteful number, since it uses less digits than its factorization.

18130500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 18130500 is about 4257.9924847280. The cubic root of 18130500 is about 262.7059608073.

Adding to 18130500 its reverse (503181), we get a palindrome (18633681).

The spelling of 18130500 in words is "eighteen million, one hundred thirty thousand, five hundred".