18059443 has 4 divisors (see below), whose sum is σ = 19009960. Its totient is φ = 17108928.

The previous prime is 18059429. The next prime is 18059473. The reversal of 18059443 is 34495081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34495081 = 443 ⋅77867.

It is a cyclic number.

It is not a de Polignac number, because 18059443 - 2⁵ = 18059411 is a prime.

It is a super-2 number, since 2×18059443² = 652286962940498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18059399 and 18059408.

It is not an unprimeable number, because it can be changed into a prime (18059413) 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, 475230 + ... + 475267.

It is an arithmetic number, because the mean of its divisors is an integer number (4752490).

Almost surely, 2^18059443 is an apocalyptic number.

18059443 is a deficient number, since it is larger than the sum of its proper divisors (950517).

18059443 is an equidigital number, since it uses as much as digits as its factorization.

18059443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950516.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 18059443 is about 4249.6403377227. The cubic root of 18059443 is about 262.3623126753.

The spelling of 18059443 in words is "eighteen million, fifty-nine thousand, four hundred forty-three".