18113645 has 16 divisors (see below), whose sum is σ = 24105600. Its totient is φ = 12955200.

The previous prime is 18113611. The next prime is 18113647. The reversal of 18113645 is 54631181.

It is not a de Polignac number, because 18113645 - 2¹⁰ = 18112621 is a prime.

It is a super-3 number, since 3×18113645³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18113647) 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, 656 + ... + 6054.

It is an arithmetic number, because the mean of its divisors is an integer number (1506600).

Almost surely, 2^18113645 is an apocalyptic number.

It is an amenable number.

18113645 is a deficient number, since it is larger than the sum of its proper divisors (5991955).

18113645 is a wasteful number, since it uses less digits than its factorization.

18113645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5476.

The product of its digits is 2880, while the sum is 29.

The square root of 18113645 is about 4256.0128054319. The cubic root of 18113645 is about 262.6245274618.

It can be divided in two parts, 181136 and 45, that added together give a palindrome (181181).

The spelling of 18113645 in words is "eighteen million, one hundred thirteen thousand, six hundred forty-five".