18030000 has 100 divisors (see below), whose sum is σ = 58300088. Its totient is φ = 4800000.

The previous prime is 18029971. The next prime is 18030041. The reversal of 18030000 is 3081.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 29700 + ... + 30300.

Almost surely, 2^18030000 is an apocalyptic number.

18030000 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 18030000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29150044).

18030000 is an abundant number, since it is smaller than the sum of its proper divisors (40270088).

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

18030000 is an equidigital number, since it uses as much as digits as its factorization.

18030000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 18030000 is about 4246.1747491124. The cubic root of 18030000 is about 262.2196553527.

Adding to 18030000 its reverse (3081), we get a palindrome (18033081).

The spelling of 18030000 in words is "eighteen million, thirty thousand".