18080329 has 2 divisors, whose sum is σ = 18080330. Its totient is φ = 18080328.

The previous prime is 18080327. The next prime is 18080351. The reversal of 18080329 is 92308081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9241600 + 8838729 = 3040^2 + 2973^2 .

It is a cyclic number.

It is not a de Polignac number, because 18080329 - 2¹ = 18080327 is a prime.

Together with 18080327, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18080329.

It is not a weakly prime, because it can be changed into another prime (18080327) 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, 9040164 + 9040165.

It is an arithmetic number, because the mean of its divisors is an integer number (9040165).

Almost surely, 2^18080329 is an apocalyptic number.

It is an amenable number.

18080329 is a deficient number, since it is larger than the sum of its proper divisors (1).

18080329 is an equidigital number, since it uses as much as digits as its factorization.

18080329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 18080329 is about 4252.0970120636. The cubic root of 18080329 is about 262.4634156120.

The spelling of 18080329 in words is "eighteen million, eighty thousand, three hundred twenty-nine".