18330629 has 2 divisors, whose sum is σ = 18330630. Its totient is φ = 18330628.

The previous prime is 18330623. The next prime is 18330647. The reversal of 18330629 is 92603381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14822500 + 3508129 = 3850^2 + 1873^2 .

It is a cyclic number.

It is not a de Polignac number, because 18330629 - 2²⁰ = 17282053 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18330595 and 18330604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18330623) 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, 9165314 + 9165315.

It is an arithmetic number, because the mean of its divisors is an integer number (9165315).

Almost surely, 2^18330629 is an apocalyptic number.

It is an amenable number.

18330629 is a deficient number, since it is larger than the sum of its proper divisors (1).

18330629 is an equidigital number, since it uses as much as digits as its factorization.

18330629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 18330629 is about 4281.4283831450. The cubic root of 18330629 is about 263.6690306474.

The spelling of 18330629 in words is "eighteen million, three hundred thirty thousand, six hundred twenty-nine".