18045015 has 16 divisors (see below), whose sum is σ = 29144448. Its totient is φ = 9533216.

The previous prime is 18044981. The next prime is 18045019. The reversal of 18045015 is 51054081.

It is a cyclic number.

It is not a de Polignac number, because 18045015 - 2⁶ = 18044951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18045019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4017 + ... + 7226.

It is an arithmetic number, because the mean of its divisors is an integer number (1821528).

Almost surely, 2^18045015 is an apocalyptic number.

18045015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18045015 is a deficient number, since it is larger than the sum of its proper divisors (11099433).

18045015 is a wasteful number, since it uses less digits than its factorization.

18045015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11358.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 18045015 is about 4247.9424431129. The cubic root of 18045015 is about 262.2924254708.

Adding to 18045015 its reverse (51054081), we get a palindrome (69099096).

The spelling of 18045015 in words is "eighteen million, forty-five thousand, fifteen".