18443541 has 4 divisors (see below), whose sum is σ = 24591392. Its totient is φ = 12295692.

The previous prime is 18443531. The next prime is 18443549. The reversal of 18443541 is 14534481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18443541 - 2⁷ = 18443413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18443499 and 18443508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18443549) 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, 3073921 + ... + 3073926.

It is an arithmetic number, because the mean of its divisors is an integer number (6147848).

Almost surely, 2^18443541 is an apocalyptic number.

It is an amenable number.

18443541 is a deficient number, since it is larger than the sum of its proper divisors (6147851).

18443541 is an equidigital number, since it uses as much as digits as its factorization.

18443541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6147850.

The product of its digits is 7680, while the sum is 30.

The square root of 18443541 is about 4294.5943929549. The cubic root of 18443541 is about 264.2093008485.

The spelling of 18443541 in words is "eighteen million, four hundred forty-three thousand, five hundred forty-one".