18306449 has 12 divisors (see below), whose sum is σ = 21365424. Its totient is φ = 15639624.

The previous prime is 18306419. The next prime is 18306451. The reversal of 18306449 is 94460381.

It is not a de Polignac number, because 18306449 - 2⁸ = 18306193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18306419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26462 + ... + 27144.

It is an arithmetic number, because the mean of its divisors is an integer number (1780452).

Almost surely, 2^18306449 is an apocalyptic number.

It is an amenable number.

18306449 is a deficient number, since it is larger than the sum of its proper divisors (3058975).

18306449 is an equidigital number, since it uses as much as digits as its factorization.

18306449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244 (or 1237 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 18306449 is about 4278.6036273532. The cubic root of 18306449 is about 263.5530440376.

The spelling of 18306449 in words is "eighteen million, three hundred six thousand, four hundred forty-nine".