18630201 has 4 divisors (see below), whose sum is σ = 24840272. Its totient is φ = 12420132.

The previous prime is 18630169. The next prime is 18630217. The reversal of 18630201 is 10203681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18630201 - 2⁵ = 18630169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18630301) 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 3 ways as a sum of consecutive naturals, for example, 3105031 + ... + 3105036.

It is an arithmetic number, because the mean of its divisors is an integer number (6210068).

Almost surely, 2^18630201 is an apocalyptic number.

It is an amenable number.

18630201 is a deficient number, since it is larger than the sum of its proper divisors (6210071).

18630201 is an equidigital number, since it uses as much as digits as its factorization.

18630201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6210070.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 18630201 is about 4316.2716550282. The cubic root of 18630201 is about 265.0976310491.

Adding to 18630201 its reverse (10203681), we get a palindrome (28833882).

The spelling of 18630201 in words is "eighteen million, six hundred thirty thousand, two hundred one".