18348943 has 4 divisors (see below), whose sum is σ = 18395560. Its totient is φ = 18302328.

The previous prime is 18348907. The next prime is 18348949. The reversal of 18348943 is 34984381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34984381 = 2087 ⋅16763.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18348943 is a prime.

It is a super-3 number, since 3×18348943³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18348896 and 18348905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18348949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22713 + ... + 23506.

It is an arithmetic number, because the mean of its divisors is an integer number (4598890).

Almost surely, 2^18348943 is an apocalyptic number.

18348943 is a deficient number, since it is larger than the sum of its proper divisors (46617).

18348943 is an equidigital number, since it uses as much as digits as its factorization.

18348943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46616.

The product of its digits is 82944, while the sum is 40.

The square root of 18348943 is about 4283.5666214032. The cubic root of 18348943 is about 263.7568113662.

It can be divided in two parts, 18348 and 943, that added together give a palindrome (19291).

The spelling of 18348943 in words is "eighteen million, three hundred forty-eight thousand, nine hundred forty-three".