18454243 has 8 divisors (see below), whose sum is σ = 18698240. Its totient is φ = 18212040.

The previous prime is 18454213. The next prime is 18454253. The reversal of 18454243 is 34245481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18454243 - 2²¹ = 16357091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18454213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41818 + ... + 42256.

It is an arithmetic number, because the mean of its divisors is an integer number (2337280).

Almost surely, 2^18454243 is an apocalyptic number.

18454243 is a deficient number, since it is larger than the sum of its proper divisors (243997).

18454243 is a wasteful number, since it uses less digits than its factorization.

18454243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897.

The product of its digits is 15360, while the sum is 31.

The square root of 18454243 is about 4295.8401972140. The cubic root of 18454243 is about 264.2603940959.

The spelling of 18454243 in words is "eighteen million, four hundred fifty-four thousand, two hundred forty-three".