18148449 has 16 divisors (see below), whose sum is σ = 27546624. Its totient is φ = 10520400.

The previous prime is 18148441. The next prime is 18148453. The reversal of 18148449 is 94484181.

It is not a de Polignac number, because 18148449 - 2³ = 18148441 is a prime.

It is a super-2 number, since 2×18148449² = 658732402211202, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18148441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11197 + ... + 12714.

It is an arithmetic number, because the mean of its divisors is an integer number (1721664).

Almost surely, 2^18148449 is an apocalyptic number.

It is an amenable number.

18148449 is a deficient number, since it is larger than the sum of its proper divisors (9398175).

18148449 is a wasteful number, since it uses less digits than its factorization.

18148449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23948.

The product of its digits is 36864, while the sum is 39.

The square root of 18148449 is about 4260.0996467219. The cubic root of 18148449 is about 262.7926242402.

The spelling of 18148449 in words is "eighteen million, one hundred forty-eight thousand, four hundred forty-nine".