18543223 has 2 divisors, whose sum is σ = 18543224. Its totient is φ = 18543222.

The previous prime is 18543167. The next prime is 18543227. The reversal of 18543223 is 32234581.

It is a strong prime.

It is an emirp because it is prime and its reverse (32234581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18543223 - 2¹⁷ = 18412151 is a prime.

It is a super-2 number, since 2×18543223² = 687702238455458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18543191 and 18543200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18543227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9271611 + 9271612.

It is an arithmetic number, because the mean of its divisors is an integer number (9271612).

Almost surely, 2^18543223 is an apocalyptic number.

18543223 is a deficient number, since it is larger than the sum of its proper divisors (1).

18543223 is an equidigital number, since it uses as much as digits as its factorization.

18543223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 28.

The square root of 18543223 is about 4306.1842738090. The cubic root of 18543223 is about 264.6844374774.

The spelling of 18543223 in words is "eighteen million, five hundred forty-three thousand, two hundred twenty-three".