18854443 has 2 divisors, whose sum is σ = 18854444. Its totient is φ = 18854442.

The previous prime is 18854419. The next prime is 18854461. The reversal of 18854443 is 34445881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18854443 - 2⁹ = 18853931 is a prime.

It is not a weakly prime, because it can be changed into another prime (18854413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9427221 + 9427222.

It is an arithmetic number, because the mean of its divisors is an integer number (9427222).

Almost surely, 2^18854443 is an apocalyptic number.

18854443 is a deficient number, since it is larger than the sum of its proper divisors (1).

18854443 is an equidigital number, since it uses as much as digits as its factorization.

18854443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61440, while the sum is 37.

The square root of 18854443 is about 4342.1703098796. The cubic root of 18854443 is about 266.1570058829.

It can be divided in two parts, 1885 and 4443, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 18854443 in words is "eighteen million, eight hundred fifty-four thousand, four hundred forty-three".