18449043 has 4 divisors (see below), whose sum is σ = 24598728. Its totient is φ = 12299360.

The previous prime is 18449027. The next prime is 18449069. The reversal of 18449043 is 34094481.

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 18449043 - 2⁴ = 18449027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18448995 and 18449013.

It is not an unprimeable number, because it can be changed into a prime (18449003) 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, 3074838 + ... + 3074843.

It is an arithmetic number, because the mean of its divisors is an integer number (6149682).

Almost surely, 2^18449043 is an apocalyptic number.

18449043 is a deficient number, since it is larger than the sum of its proper divisors (6149685).

18449043 is an equidigital number, since it uses as much as digits as its factorization.

18449043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6149684.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 18449043 is about 4295.2349179061. The cubic root of 18449043 is about 264.2355708409.

The spelling of 18449043 in words is "eighteen million, four hundred forty-nine thousand, forty-three".