18424853 has 4 divisors (see below), whose sum is σ = 18922860. Its totient is φ = 17926848.

The previous prime is 18424841. The next prime is 18424871. The reversal of 18424853 is 35842481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35842481 = 2141 ⋅16741.

It can be written as a sum of positive squares in 2 ways, for example, as 11444689 + 6980164 = 3383^2 + 2642^2 .

It is a cyclic number.

It is not a de Polignac number, because 18424853 - 2¹⁰ = 18423829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18424823) 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, 248948 + ... + 249021.

It is an arithmetic number, because the mean of its divisors is an integer number (4730715).

Almost surely, 2^18424853 is an apocalyptic number.

It is an amenable number.

18424853 is a deficient number, since it is larger than the sum of its proper divisors (498007).

18424853 is an equidigital number, since it uses as much as digits as its factorization.

18424853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498006.

The product of its digits is 30720, while the sum is 35.

The square root of 18424853 is about 4292.4180830856. The cubic root of 18424853 is about 264.1200336082.

The spelling of 18424853 in words is "eighteen million, four hundred twenty-four thousand, eight hundred fifty-three".