18124559 has 2 divisors, whose sum is σ = 18124560. Its totient is φ = 18124558.

The previous prime is 18124549. The next prime is 18124597. The reversal of 18124559 is 95542181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18124559 - 2¹² = 18120463 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18124549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9062279 + 9062280.

It is an arithmetic number, because the mean of its divisors is an integer number (9062280).

Almost surely, 2^18124559 is an apocalyptic number.

18124559 is a deficient number, since it is larger than the sum of its proper divisors (1).

18124559 is an equidigital number, since it uses as much as digits as its factorization.

18124559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 35.

The square root of 18124559 is about 4257.2947983432. The cubic root of 18124559 is about 262.6772631869.

The spelling of 18124559 in words is "eighteen million, one hundred twenty-four thousand, five hundred fifty-nine".