18229073 has 2 divisors, whose sum is σ = 18229074. Its totient is φ = 18229072.

The previous prime is 18229067. The next prime is 18229097. The reversal of 18229073 is 37092281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15499969 + 2729104 = 3937^2 + 1652^2 .

It is a cyclic number.

It is not a de Polignac number, because 18229073 - 2⁶ = 18229009 is a prime.

It is not a weakly prime, because it can be changed into another prime (18229063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9114536 + 9114537.

It is an arithmetic number, because the mean of its divisors is an integer number (9114537).

Almost surely, 2^18229073 is an apocalyptic number.

It is an amenable number.

18229073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18229073 is an equidigital number, since it uses as much as digits as its factorization.

18229073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 18229073 is about 4269.5518500189. The cubic root of 18229073 is about 263.1811991341.

The spelling of 18229073 in words is "eighteen million, two hundred twenty-nine thousand, seventy-three".