18260243 has 2 divisors, whose sum is σ = 18260244. Its totient is φ = 18260242.

The previous prime is 18260239. The next prime is 18260267. The reversal of 18260243 is 34206281.

It is a weak prime.

It is an emirp because it is prime and its reverse (34206281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18260243 - 2² = 18260239 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18260213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9130121 + 9130122.

It is an arithmetic number, because the mean of its divisors is an integer number (9130122).

Almost surely, 2^18260243 is an apocalyptic number.

18260243 is a deficient number, since it is larger than the sum of its proper divisors (1).

18260243 is an equidigital number, since it uses as much as digits as its factorization.

18260243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 18260243 is about 4273.2005569596. The cubic root of 18260243 is about 263.3311187480.

The spelling of 18260243 in words is "eighteen million, two hundred sixty thousand, two hundred forty-three".