18445829 has 2 divisors, whose sum is σ = 18445830. Its totient is φ = 18445828.

The previous prime is 18445813. The next prime is 18445841. The reversal of 18445829 is 92854481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15288100 + 3157729 = 3910^2 + 1777^2 .

It is an emirp because it is prime and its reverse (92854481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18445829 - 2⁴ = 18445813 is a prime.

It is a Chen prime.

It is equal to p_1177979 and since 18445829 and 1177979 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18445849) 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, 9222914 + 9222915.

It is an arithmetic number, because the mean of its divisors is an integer number (9222915).

Almost surely, 2^18445829 is an apocalyptic number.

It is an amenable number.

18445829 is a deficient number, since it is larger than the sum of its proper divisors (1).

18445829 is an equidigital number, since it uses as much as digits as its factorization.

18445829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 41.

The square root of 18445829 is about 4294.8607660785. The cubic root of 18445829 is about 264.2202258273.

The spelling of 18445829 in words is "eighteen million, four hundred forty-five thousand, eight hundred twenty-nine".