18127449 has 16 divisors (see below), whose sum is σ = 27182400. Its totient is φ = 11937888.

The previous prime is 18127441. The next prime is 18127451. The reversal of 18127449 is 94472181.

It is not a de Polignac number, because 18127449 - 2³ = 18127441 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18127441) 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, 1804 + ... + 6285.

It is an arithmetic number, because the mean of its divisors is an integer number (1698900).

Almost surely, 2^18127449 is an apocalyptic number.

It is an amenable number.

18127449 is a deficient number, since it is larger than the sum of its proper divisors (9054951).

18127449 is an equidigital number, since it uses as much as digits as its factorization.

18127449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8181 (or 8175 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 18127449 is about 4257.6342022302. The cubic root of 18127449 is about 262.6912239302.

It can be divided in two parts, 1812 and 7449, that added together give a cube (9261 = 21³).

The spelling of 18127449 in words is "eighteen million, one hundred twenty-seven thousand, four hundred forty-nine".