18180201 has 16 divisors (see below), whose sum is σ = 26550720. Its totient is φ = 10996800.

The previous prime is 18180199. The next prime is 18180223. The reversal of 18180201 is 10208181.

It is not a de Polignac number, because 18180201 - 2¹ = 18180199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18182201) 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 15 ways as a sum of consecutive naturals, for example, 1650 + ... + 6251.

It is an arithmetic number, because the mean of its divisors is an integer number (1659420).

Almost surely, 2^18180201 is an apocalyptic number.

It is an amenable number.

18180201 is a deficient number, since it is larger than the sum of its proper divisors (8370519).

18180201 is a wasteful number, since it uses less digits than its factorization.

18180201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7976.

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 18180201 is about 4263.8246915182. The cubic root of 18180201 is about 262.9457930661.

Adding to 18180201 its reverse (10208181), we get a palindrome (28388382).

It can be divided in two parts, 18180 and 201, that added together give a palindrome (18381).

The spelling of 18180201 in words is "eighteen million, one hundred eighty thousand, two hundred one".