18040201 has 8 divisors (see below), whose sum is σ = 18833864. Its totient is φ = 17262720.

The previous prime is 18040181. The next prime is 18040207. The reversal of 18040201 is 10204081.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 104976 + 17935225 = 324^2 + 4235^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18040201 - 2⁹ = 18039689 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (18040207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1740 + ... + 6253.

It is an arithmetic number, because the mean of its divisors is an integer number (2354233).

Almost surely, 2^18040201 is an apocalyptic number.

It is an amenable number.

18040201 is a deficient number, since it is larger than the sum of its proper divisors (793663).

18040201 is an equidigital number, since it uses as much as digits as its factorization.

18040201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8091.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 18040201 is about 4247.3757780540. The cubic root of 18040201 is about 262.2690988431.

Adding to 18040201 its reverse (10204081), we get a palindrome (28244282).

The spelling of 18040201 in words is "eighteen million, forty thousand, two hundred one".