18014915 has 4 divisors (see below), whose sum is σ = 21617904. Its totient is φ = 14411928.

The previous prime is 18014897. The next prime is 18014921. The reversal of 18014915 is 51941081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51941081 = 37 ⋅1403813.

It is a cyclic number.

It is not a de Polignac number, because 18014915 - 2¹² = 18010819 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1801487 + ... + 1801496.

It is an arithmetic number, because the mean of its divisors is an integer number (5404476).

Almost surely, 2^18014915 is an apocalyptic number.

18014915 is a deficient number, since it is larger than the sum of its proper divisors (3602989).

18014915 is an equidigital number, since it uses as much as digits as its factorization.

18014915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3602988.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 18014915 is about 4244.3980727543. The cubic root of 18014915 is about 262.1465052848.

Adding to 18014915 its reverse (51941081), we get a palindrome (69955996).

The spelling of 18014915 in words is "eighteen million, fourteen thousand, nine hundred fifteen".