18072259 has 2 divisors, whose sum is σ = 18072260. Its totient is φ = 18072258.

The previous prime is 18072247. The next prime is 18072281. The reversal of 18072259 is 95227081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18072259 - 2⁹ = 18071747 is a prime.

It is not a weakly prime, because it can be changed into another prime (18072209) 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, 9036129 + 9036130.

It is an arithmetic number, because the mean of its divisors is an integer number (9036130).

Almost surely, 2^18072259 is an apocalyptic number.

18072259 is a deficient number, since it is larger than the sum of its proper divisors (1).

18072259 is an equidigital number, since it uses as much as digits as its factorization.

18072259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 18072259 is about 4251.1479626096. The cubic root of 18072259 is about 262.4243603682.

The spelling of 18072259 in words is "eighteen million, seventy-two thousand, two hundred fifty-nine".