18422201 has 4 divisors (see below), whose sum is σ = 21053952. Its totient is φ = 15790452.

The previous prime is 18422197. The next prime is 18422213. The reversal of 18422201 is 10222481.

It is a happy number.

18422201 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

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: 10222481 = 53 ⋅192877.

It is a cyclic number.

It is not a de Polignac number, because 18422201 - 2² = 18422197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18422231) 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, 1315865 + ... + 1315878.

It is an arithmetic number, because the mean of its divisors is an integer number (5263488).

Almost surely, 2^18422201 is an apocalyptic number.

It is an amenable number.

18422201 is a deficient number, since it is larger than the sum of its proper divisors (2631751).

18422201 is an equidigital number, since it uses as much as digits as its factorization.

18422201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631750.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 18422201 is about 4292.1091551823. The cubic root of 18422201 is about 264.1073608714.

Adding to 18422201 its reverse (10222481), we get a palindrome (28644682).

The spelling of 18422201 in words is "eighteen million, four hundred twenty-two thousand, two hundred one".