18249563 has 2 divisors, whose sum is σ = 18249564. Its totient is φ = 18249562.

The previous prime is 18249529. The next prime is 18249611. The reversal of 18249563 is 36594281.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18249563 - 2⁶ = 18249499 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18249463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9124781 + 9124782.

It is an arithmetic number, because the mean of its divisors is an integer number (9124782).

Almost surely, 2^18249563 is an apocalyptic number.

18249563 is a deficient number, since it is larger than the sum of its proper divisors (1).

18249563 is an equidigital number, since it uses as much as digits as its factorization.

18249563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 18249563 is about 4271.9507253713. The cubic root of 18249563 is about 263.2797699456.

The spelling of 18249563 in words is "eighteen million, two hundred forty-nine thousand, five hundred sixty-three".