18050729 has 2 divisors, whose sum is σ = 18050730. Its totient is φ = 18050728.

The previous prime is 18050723. The next prime is 18050749. The reversal of 18050729 is 92705081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15642025 + 2408704 = 3955^2 + 1552^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18050729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18050695 and 18050704.

It is not a weakly prime, because it can be changed into another prime (18050723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9025364 + 9025365.

It is an arithmetic number, because the mean of its divisors is an integer number (9025365).

Almost surely, 2^18050729 is an apocalyptic number.

It is an amenable number.

18050729 is a deficient number, since it is larger than the sum of its proper divisors (1).

18050729 is an equidigital number, since it uses as much as digits as its factorization.

18050729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 18050729 is about 4248.6149507810. The cubic root of 18050729 is about 262.3201077375.

It can be divided in two parts, 1805072 and 9, that added together give a palindrome (1805081).

The spelling of 18050729 in words is "eighteen million, fifty thousand, seven hundred twenty-nine".