18029305 has 12 divisors (see below), whose sum is σ = 25167780. Its totient is φ = 12362784.

The previous prime is 18029303. The next prime is 18029351. The reversal of 18029305 is 50392081.

It can be written as a sum of positive squares in 2 ways, for example, as 10916416 + 7112889 = 3304^2 + 2667^2 .

It is not a de Polignac number, because 18029305 - 2¹ = 18029303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18029303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36550 + ... + 37039.

It is an arithmetic number, because the mean of its divisors is an integer number (2097315).

Almost surely, 2^18029305 is an apocalyptic number.

It is an amenable number.

18029305 is a deficient number, since it is larger than the sum of its proper divisors (7138475).

18029305 is an equidigital number, since it uses as much as digits as its factorization.

18029305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73608 (or 73601 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 18029305 is about 4246.0929099585. The cubic root of 18029305 is about 262.2162860608.

The spelling of 18029305 in words is "eighteen million, twenty-nine thousand, three hundred five".