18033313 has 2 divisors, whose sum is σ = 18033314. Its totient is φ = 18033312.

The previous prime is 18033241. The next prime is 18033377. The reversal of 18033313 is 31333081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17497489 + 535824 = 4183^2 + 732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18033313 is a prime.

It is not a weakly prime, because it can be changed into another prime (18033013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9016656 + 9016657.

It is an arithmetic number, because the mean of its divisors is an integer number (9016657).

Almost surely, 2^18033313 is an apocalyptic number.

It is an amenable number.

18033313 is a deficient number, since it is larger than the sum of its proper divisors (1).

18033313 is an equidigital number, since it uses as much as digits as its factorization.

18033313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 18033313 is about 4246.5648470264. The cubic root of 18033313 is about 262.2357152624.

Adding to 18033313 its reverse (31333081), we get a palindrome (49366394).

The spelling of 18033313 in words is "eighteen million, thirty-three thousand, three hundred thirteen".