18144443 has 2 divisors, whose sum is σ = 18144444. Its totient is φ = 18144442.

The previous prime is 18144437. The next prime is 18144461. The reversal of 18144443 is 34444181.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18144443 - 2¹⁴ = 18128059 is a prime.

It is not a weakly prime, because it can be changed into another prime (18144433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9072221 + 9072222.

It is an arithmetic number, because the mean of its divisors is an integer number (9072222).

Almost surely, 2^18144443 is an apocalyptic number.

18144443 is a deficient number, since it is larger than the sum of its proper divisors (1).

18144443 is an equidigital number, since it uses as much as digits as its factorization.

18144443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 29.

The square root of 18144443 is about 4259.6294439775. The cubic root of 18144443 is about 262.7732869638.

The spelling of 18144443 in words is "eighteen million, one hundred forty-four thousand, four hundred forty-three".