18481343 has 4 divisors (see below), whose sum is σ = 18603888. Its totient is φ = 18358800.

The previous prime is 18481321. The next prime is 18481369. The reversal of 18481343 is 34318481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34318481 = 1753 ⋅19577.

It is a cyclic number.

It is not a de Polignac number, because 18481343 - 2¹² = 18477247 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 (18481543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61046 + ... + 61347.

It is an arithmetic number, because the mean of its divisors is an integer number (4650972).

Almost surely, 2^18481343 is an apocalyptic number.

18481343 is a deficient number, since it is larger than the sum of its proper divisors (122545).

18481343 is a wasteful number, since it uses less digits than its factorization.

18481343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122544.

The product of its digits is 9216, while the sum is 32.

The square root of 18481343 is about 4298.9932542399. The cubic root of 18481343 is about 264.3896860246.

The spelling of 18481343 in words is "eighteen million, four hundred eighty-one thousand, three hundred forty-three".