18448243 has 4 divisors (see below), whose sum is σ = 20125368. Its totient is φ = 16771120.

The previous prime is 18448223. The next prime is 18448271. The reversal of 18448243 is 34284481.

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 18448243 - 2⁵ = 18448211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18448199 and 18448208.

It is not an unprimeable number, because it can be changed into a prime (18448223) 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, 838546 + ... + 838567.

It is an arithmetic number, because the mean of its divisors is an integer number (5031342).

Almost surely, 2^18448243 is an apocalyptic number.

18448243 is a deficient number, since it is larger than the sum of its proper divisors (1677125).

18448243 is a wasteful number, since it uses less digits than its factorization.

18448243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677124.

The product of its digits is 24576, while the sum is 34.

The square root of 18448243 is about 4295.1417904418. The cubic root of 18448243 is about 264.2317514646.

The spelling of 18448243 in words is "eighteen million, four hundred forty-eight thousand, two hundred forty-three".