18246247 has 2 divisors, whose sum is σ = 18246248. Its totient is φ = 18246246.

The previous prime is 18246227. The next prime is 18246269. The reversal of 18246247 is 74264281.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18246247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18246227) 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, 9123123 + 9123124.

It is an arithmetic number, because the mean of its divisors is an integer number (9123124).

Almost surely, 2^18246247 is an apocalyptic number.

18246247 is a deficient number, since it is larger than the sum of its proper divisors (1).

18246247 is an equidigital number, since it uses as much as digits as its factorization.

18246247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 34.

The square root of 18246247 is about 4271.5625946485. The cubic root of 18246247 is about 263.2638227400.

The spelling of 18246247 in words is "eighteen million, two hundred forty-six thousand, two hundred forty-seven".