18080401 has 4 divisors (see below), whose sum is σ = 19143972. Its totient is φ = 17016832.

The previous prime is 18080399. The next prime is 18080407. The reversal of 18080401 is 10408081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10408081 = 131 ⋅79451.

It can be written as a sum of positive squares in 2 ways, for example, as 7420176 + 10660225 = 2724^2 + 3265^2 .

It is a cyclic number.

It is not a de Polignac number, because 18080401 - 2¹ = 18080399 is a prime.

It is a super-3 number, since 3×18080401³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18080407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531760 + ... + 531793.

It is an arithmetic number, because the mean of its divisors is an integer number (4785993).

Almost surely, 2^18080401 is an apocalyptic number.

It is an amenable number.

18080401 is a deficient number, since it is larger than the sum of its proper divisors (1063571).

18080401 is a wasteful number, since it uses less digits than its factorization.

18080401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063570.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 18080401 is about 4252.1054784659. The cubic root of 18080401 is about 262.4637640080.

Adding to 18080401 its reverse (10408081), we get a palindrome (28488482).

It can be divided in two parts, 18080 and 401, that added together give a palindrome (18481).

The spelling of 18080401 in words is "eighteen million, eighty thousand, four hundred one".