18448427 has 4 divisors (see below), whose sum is σ = 18708336. Its totient is φ = 18188520.

The previous prime is 18448403. The next prime is 18448429. The reversal of 18448427 is 72484481.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18448427 - 2²⁴ = 1671211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18448429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129848 + ... + 129989.

It is an arithmetic number, because the mean of its divisors is an integer number (4677084).

Almost surely, 2^18448427 is an apocalyptic number.

18448427 is a deficient number, since it is larger than the sum of its proper divisors (259909).

18448427 is an equidigital number, since it uses as much as digits as its factorization.

18448427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259908.

The product of its digits is 57344, while the sum is 38.

The square root of 18448427 is about 4295.1632099374. The cubic root of 18448427 is about 264.2326299309.

The spelling of 18448427 in words is "eighteen million, four hundred forty-eight thousand, four hundred twenty-seven".