18027975 has 48 divisors (see below), whose sum is σ = 35569152. Its totient is φ = 7877760.

The previous prime is 18027959. The next prime is 18028013. The reversal of 18027975 is 57972081.

18027975 = 186² + 187² + ... + 392².

It is not a de Polignac number, because 18027975 - 2⁴ = 18027959 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11329 + ... + 12821.

It is an arithmetic number, because the mean of its divisors is an integer number (741024).

Almost surely, 2^18027975 is an apocalyptic number.

18027975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18027975 is a deficient number, since it is larger than the sum of its proper divisors (17541177).

18027975 is a wasteful number, since it uses less digits than its factorization.

18027975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536 (or 1531 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 18027975 is about 4245.9362925037. The cubic root of 18027975 is about 262.2098381096.

The spelling of 18027975 in words is "eighteen million, twenty-seven thousand, nine hundred seventy-five".