18104407 has 2 divisors, whose sum is σ = 18104408. Its totient is φ = 18104406.

The previous prime is 18104389. The next prime is 18104417. The reversal of 18104407 is 70440181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18104407 - 2¹⁵ = 18071639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18104417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9052203 + 9052204.

It is an arithmetic number, because the mean of its divisors is an integer number (9052204).

Almost surely, 2^18104407 is an apocalyptic number.

18104407 is a deficient number, since it is larger than the sum of its proper divisors (1).

18104407 is an equidigital number, since it uses as much as digits as its factorization.

18104407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 18104407 is about 4254.9273789337. The cubic root of 18104407 is about 262.5798735016.

Adding to 18104407 its reverse (70440181), we get a palindrome (88544588).

The spelling of 18104407 in words is "eighteen million, one hundred four thousand, four hundred seven".