18804413 has 2 divisors, whose sum is σ = 18804414. Its totient is φ = 18804412.

The previous prime is 18804389. The next prime is 18804437. The reversal of 18804413 is 31440881.

It is a balanced prime because it is at equal distance from previous prime (18804389) and next prime (18804437).

It can be written as a sum of positive squares in only one way, i.e., 15856324 + 2948089 = 3982^2 + 1717^2 .

It is a cyclic number.

It is not a de Polignac number, because 18804413 - 2⁶ = 18804349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18804463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9402206 + 9402207.

It is an arithmetic number, because the mean of its divisors is an integer number (9402207).

Almost surely, 2^18804413 is an apocalyptic number.

It is an amenable number.

18804413 is a deficient number, since it is larger than the sum of its proper divisors (1).

18804413 is an equidigital number, since it uses as much as digits as its factorization.

18804413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 18804413 is about 4336.4055391534. The cubic root of 18804413 is about 265.9213827252.

The spelling of 18804413 in words is "eighteen million, eight hundred four thousand, four hundred thirteen".