18545005 has 8 divisors (see below), whose sum is σ = 22417272. Its totient is φ = 14727168.

The previous prime is 18544979. The next prime is 18545041. The reversal of 18545005 is 50054581.

It can be written as a sum of positive squares in 4 ways, for example, as 2368521 + 16176484 = 1539^2 + 4022^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18545005 - 2⁵ = 18544973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12852 + ... + 14221.

It is an arithmetic number, because the mean of its divisors is an integer number (2802159).

Almost surely, 2^18545005 is an apocalyptic number.

It is an amenable number.

18545005 is a deficient number, since it is larger than the sum of its proper divisors (3872267).

18545005 is a wasteful number, since it uses less digits than its factorization.

18545005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27215.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 18545005 is about 4306.3911805594. The cubic root of 18545005 is about 264.6929159129.

Subtracting from 18545005 its product of nonzero digits (4000), we obtain a triangular number (18541005 = T₆₀₈₉).

Adding to 18545005 its reverse (50054581), we get a palindrome (68599586).

It can be divided in two parts, 1854 and 5005, that added together give a cube (6859 = 19³).

The spelling of 18545005 in words is "eighteen million, five hundred forty-five thousand, five".