18054015 has 32 divisors (see below), whose sum is σ = 33277440. Its totient is φ = 8187264.

The previous prime is 18054007. The next prime is 18054019. The reversal of 18054015 is 51045081.

It is not a de Polignac number, because 18054015 - 2³ = 18054007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18054019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13977 + ... + 15213.

It is an arithmetic number, because the mean of its divisors is an integer number (1039920).

Almost surely, 2^18054015 is an apocalyptic number.

18054015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18054015 is a deficient number, since it is larger than the sum of its proper divisors (15223425).

18054015 is a wasteful number, since it uses less digits than its factorization.

18054015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391.

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

The square root of 18054015 is about 4249.0016474461. The cubic root of 18054015 is about 262.3360245752.

Adding to 18054015 its reverse (51045081), we get a palindrome (69099096).

The spelling of 18054015 in words is "eighteen million, fifty-four thousand, fifteen".