18025015 has 16 divisors (see below), whose sum is σ = 24109920. Its totient is φ = 12856320.

The previous prime is 18025001. The next prime is 18025019. The reversal of 18025015 is 51052081.

It is a de Polignac number, because none of the positive numbers 2^k-18025015 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18025019) 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, 3966 + ... + 7195.

It is an arithmetic number, because the mean of its divisors is an integer number (1506870).

Almost surely, 2^18025015 is an apocalyptic number.

18025015 is a deficient number, since it is larger than the sum of its proper divisors (6084905).

18025015 is a wasteful number, since it uses less digits than its factorization.

18025015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11202.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 18025015 is about 4245.5877096110. The cubic root of 18025015 is about 262.1954866437.

Adding to 18025015 its reverse (51052081), we get a palindrome (69077096).

The spelling of 18025015 in words is "eighteen million, twenty-five thousand, fifteen".