18130201 has 4 divisors (see below), whose sum is σ = 18182500. Its totient is φ = 18077904.

The previous prime is 18130193. The next prime is 18130213. The reversal of 18130201 is 10203181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8526400 + 9603801 = 2920^2 + 3099^2 .

It is a cyclic number.

It is not a de Polignac number, because 18130201 - 2³ = 18130193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18130291) 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, 25626 + ... + 26323.

It is an arithmetic number, because the mean of its divisors is an integer number (4545625).

Almost surely, 2^18130201 is an apocalyptic number.

It is an amenable number.

18130201 is a deficient number, since it is larger than the sum of its proper divisors (52299).

18130201 is an equidigital number, since it uses as much as digits as its factorization.

18130201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52298.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 18130201 is about 4257.9573741408. The cubic root of 18130201 is about 262.7045166567.

Adding to 18130201 its reverse (10203181), we get a palindrome (28333382).

The spelling of 18130201 in words is "eighteen million, one hundred thirty thousand, two hundred one".