18481459 has 2 divisors, whose sum is σ = 18481460. Its totient is φ = 18481458.

The previous prime is 18481427. The next prime is 18481501. The reversal of 18481459 is 95418481.

It is a weak prime.

It is an emirp because it is prime and its reverse (95418481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18481459 - 2⁵ = 18481427 is a prime.

It is not a weakly prime, because it can be changed into another prime (18487459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9240729 + 9240730.

It is an arithmetic number, because the mean of its divisors is an integer number (9240730).

Almost surely, 2^18481459 is an apocalyptic number.

18481459 is a deficient number, since it is larger than the sum of its proper divisors (1).

18481459 is an equidigital number, since it uses as much as digits as its factorization.

18481459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 40.

The square root of 18481459 is about 4299.0067457495. The cubic root of 18481459 is about 264.3902391795.

The spelling of 18481459 in words is "eighteen million, four hundred eighty-one thousand, four hundred fifty-nine".