18408101 has 2 divisors, whose sum is σ = 18408102. Its totient is φ = 18408100.

The previous prime is 18408083. The next prime is 18408107. The reversal of 18408101 is 10180481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10562500 + 7845601 = 3250^2 + 2801^2 .

It is an emirp because it is prime and its reverse (10180481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18408101 - 2⁶ = 18408037 is a prime.

It is a super-3 number, since 3×18408101³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18408107) 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 as a sum of consecutive naturals, namely, 9204050 + 9204051.

It is an arithmetic number, because the mean of its divisors is an integer number (9204051).

Almost surely, 2^18408101 is an apocalyptic number.

It is an amenable number.

18408101 is a deficient number, since it is larger than the sum of its proper divisors (1).

18408101 is an equidigital number, since it uses as much as digits as its factorization.

18408101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 18408101 is about 4290.4662916751. The cubic root of 18408101 is about 264.0399627673.

Adding to 18408101 its reverse (10180481), we get a palindrome (28588582).

The spelling of 18408101 in words is "eighteen million, four hundred eight thousand, one hundred one".