18030293 has 2 divisors, whose sum is σ = 18030294. Its totient is φ = 18030292.

The previous prime is 18030241. The next prime is 18030323. The reversal of 18030293 is 39203081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13712209 + 4318084 = 3703^2 + 2078^2 .

It is a cyclic number.

It is not a de Polignac number, because 18030293 - 2¹⁰ = 18029269 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18030203) 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 as a sum of consecutive naturals, namely, 9015146 + 9015147.

It is an arithmetic number, because the mean of its divisors is an integer number (9015147).

Almost surely, 2^18030293 is an apocalyptic number.

It is an amenable number.

18030293 is a deficient number, since it is larger than the sum of its proper divisors (1).

18030293 is an equidigital number, since it uses as much as digits as its factorization.

18030293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 18030293 is about 4246.2092506140. The cubic root of 18030293 is about 262.2210757621.

The spelling of 18030293 in words is "eighteen million, thirty thousand, two hundred ninety-three".