18201201 has 4 divisors (see below), whose sum is σ = 24268272. Its totient is φ = 12134132.

The previous prime is 18201193. The next prime is 18201217. The reversal of 18201201 is 10210281.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10210281 = 3 ⋅3403427.

It is a cyclic number.

It is not a de Polignac number, because 18201201 - 2³ = 18201193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18211201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3033531 + ... + 3033536.

It is an arithmetic number, because the mean of its divisors is an integer number (6067068).

Almost surely, 2^18201201 is an apocalyptic number.

It is an amenable number.

18201201 is a deficient number, since it is larger than the sum of its proper divisors (6067071).

18201201 is an equidigital number, since it uses as much as digits as its factorization.

18201201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6067070.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 18201201 is about 4266.2865585893. The cubic root of 18201201 is about 263.0469972444.

Adding to 18201201 its reverse (10210281), we get a palindrome (28411482).

The spelling of 18201201 in words is "eighteen million, two hundred one thousand, two hundred one".