18226201 has 4 divisors (see below), whose sum is σ = 20829952. Its totient is φ = 15622452.

The previous prime is 18226199. The next prime is 18226207. The reversal of 18226201 is 10262281.

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 a cyclic number.

It is not a de Polignac number, because 18226201 - 2¹ = 18226199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18226207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1301865 + ... + 1301878.

It is an arithmetic number, because the mean of its divisors is an integer number (5207488).

Almost surely, 2^18226201 is an apocalyptic number.

It is an amenable number.

18226201 is a deficient number, since it is larger than the sum of its proper divisors (2603751).

18226201 is an equidigital number, since it uses as much as digits as its factorization.

18226201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603750.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 18226201 is about 4269.2155017052. The cubic root of 18226201 is about 263.1673769629.

Adding to 18226201 its reverse (10262281), we get a palindrome (28488482).

The spelling of 18226201 in words is "eighteen million, two hundred twenty-six thousand, two hundred one".