18229573 has 2 divisors, whose sum is σ = 18229574. Its totient is φ = 18229572.

The previous prime is 18229537. The next prime is 18229577. The reversal of 18229573 is 37592281.

Together with previous prime (18229537) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12837889 + 5391684 = 3583^2 + 2322^2 .

It is a cyclic number.

It is not a de Polignac number, because 18229573 - 2¹⁷ = 18098501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18229577) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9114786 + 9114787.

It is an arithmetic number, because the mean of its divisors is an integer number (9114787).

Almost surely, 2^18229573 is an apocalyptic number.

It is an amenable number.

18229573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18229573 is an equidigital number, since it uses as much as digits as its factorization.

18229573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 18229573 is about 4269.6104037722. The cubic root of 18229573 is about 263.1836053525.

It can be divided in two parts, 18 and 229573, that multiplied together give a palindrome (4132314).

The spelling of 18229573 in words is "eighteen million, two hundred twenty-nine thousand, five hundred seventy-three".