18030217 has 8 divisors (see below), whose sum is σ = 19281672. Its totient is φ = 16800000.

The previous prime is 18030203. The next prime is 18030227. The reversal of 18030217 is 71203081.

It can be written as a sum of positive squares in 4 ways, for example, as 7974976 + 10055241 = 2824^2 + 3171^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18030217 - 2¹⁵ = 17997449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18030227) 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 7 ways as a sum of consecutive naturals, for example, 3534 + ... + 6967.

It is an arithmetic number, because the mean of its divisors is an integer number (2410209).

Almost surely, 2^18030217 is an apocalyptic number.

18030217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18030217 is a deficient number, since it is larger than the sum of its proper divisors (1251455).

18030217 is a wasteful number, since it uses less digits than its factorization.

18030217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10619.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 18030217 is about 4246.2003014460. The cubic root of 18030217 is about 262.2207073298.

Adding to 18030217 its reverse (71203081), we get a palindrome (89233298).

The spelling of 18030217 in words is "eighteen million, thirty thousand, two hundred seventeen".