18427201 has 16 divisors (see below), whose sum is σ = 21168000. Its totient is φ = 15890688.

The previous prime is 18427193. The next prime is 18427223. The reversal of 18427201 is 10272481.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18427201 - 2³ = 18427193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18427291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43770 + ... + 44188.

It is an arithmetic number, because the mean of its divisors is an integer number (1323000).

Almost surely, 2^18427201 is an apocalyptic number.

It is an amenable number.

18427201 is a deficient number, since it is larger than the sum of its proper divisors (2740799).

18427201 is a wasteful number, since it uses less digits than its factorization.

18427201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 18427201 is about 4292.6915798832. The cubic root of 18427201 is about 264.1312526484.

Adding to 18427201 its reverse (10272481), we get a palindrome (28699682).

The spelling of 18427201 in words is "eighteen million, four hundred twenty-seven thousand, two hundred one".