18057223 has 2 divisors, whose sum is σ = 18057224. Its totient is φ = 18057222.

The previous prime is 18057203. The next prime is 18057251. The reversal of 18057223 is 32275081.

It is an a-pointer prime, because the next prime (18057251) can be obtained adding 18057223 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18057223 is a prime.

It is equal to p_1154755 and since 18057223 and 1154755 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 18057191 and 18057200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18057203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9028611 + 9028612.

It is an arithmetic number, because the mean of its divisors is an integer number (9028612).

Almost surely, 2^18057223 is an apocalyptic number.

18057223 is a deficient number, since it is larger than the sum of its proper divisors (1).

18057223 is an equidigital number, since it uses as much as digits as its factorization.

18057223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 18057223 is about 4249.3791311202. The cubic root of 18057223 is about 262.3515617309.

The spelling of 18057223 in words is "eighteen million, fifty-seven thousand, two hundred twenty-three".