18319043 has 4 divisors (see below), whose sum is σ = 18329928. Its totient is φ = 18308160.

The previous prime is 18319027. The next prime is 18319057. The reversal of 18319043 is 34091381.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 34091381 = 3919 ⋅8699.

It is a cyclic number.

It is not a de Polignac number, because 18319043 - 2⁴ = 18319027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18318997 and 18319015.

It is not an unprimeable number, because it can be changed into a prime (18319003) 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, 2321 + ... + 6482.

It is an arithmetic number, because the mean of its divisors is an integer number (4582482).

Almost surely, 2^18319043 is an apocalyptic number.

18319043 is a deficient number, since it is larger than the sum of its proper divisors (10885).

18319043 is an equidigital number, since it uses as much as digits as its factorization.

18319043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10884.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 18319043 is about 4280.0751161633. The cubic root of 18319043 is about 263.6134676653.

The spelling of 18319043 in words is "eighteen million, three hundred nineteen thousand, forty-three".