18126305 has 16 divisors (see below), whose sum is σ = 23058000. Its totient is φ = 13655040.

The previous prime is 18126271. The next prime is 18126307. The reversal of 18126305 is 50362181.

It can be written as a sum of positive squares in 8 ways, for example, as 5216656 + 12909649 = 2284^2 + 3593^2 .

It is not a de Polignac number, because 18126305 - 2²⁰ = 17077729 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18126307) 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 in 15 ways as a sum of consecutive naturals, for example, 4421 + ... + 7469.

It is an arithmetic number, because the mean of its divisors is an integer number (1441125).

Almost surely, 2^18126305 is an apocalyptic number.

It is an amenable number.

18126305 is a deficient number, since it is larger than the sum of its proper divisors (4931695).

18126305 is a wasteful number, since it uses less digits than its factorization.

18126305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3124.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 18126305 is about 4257.4998532002. The cubic root of 18126305 is about 262.6856977788.

Adding to 18126305 its reverse (50362181), we get a palindrome (68488486).

The spelling of 18126305 in words is "eighteen million, one hundred twenty-six thousand, three hundred five".