18080201 has 4 divisors (see below), whose sum is σ = 18089412. Its totient is φ = 18070992.

The previous prime is 18080149. The next prime is 18080203. The reversal of 18080201 is 10208081.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6864400 + 11215801 = 2620^2 + 3349^2 .

It is a cyclic number.

It is not a de Polignac number, because 18080201 - 2²² = 13885897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18080203) 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, 350 + ... + 6023.

It is an arithmetic number, because the mean of its divisors is an integer number (4522353).

Almost surely, 2^18080201 is an apocalyptic number.

It is an amenable number.

18080201 is a deficient number, since it is larger than the sum of its proper divisors (9211).

18080201 is an equidigital number, since it uses as much as digits as its factorization.

18080201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9210.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 18080201 is about 4252.0819606400. The cubic root of 18080201 is about 262.4627962391.

Adding to 18080201 its reverse (10208081), we get a palindrome (28288282).

It can be divided in two parts, 18080 and 201, that added together give a palindrome (18281).

The spelling of 18080201 in words is "eighteen million, eighty thousand, two hundred one".