18048321 has 6 divisors (see below), whose sum is σ = 26069810. Its totient is φ = 12032208.

The previous prime is 18048319. The next prime is 18048337. The reversal of 18048321 is 12384081.

18048321 is a `hidden beast` number, since 180 + 483 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17640000 + 408321 = 4200^2 + 639^2 .

It is not a de Polignac number, because 18048321 - 2¹ = 18048319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18048361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1002676 + ... + 1002693.

Almost surely, 2^18048321 is an apocalyptic number.

It is an amenable number.

18048321 is a deficient number, since it is larger than the sum of its proper divisors (8021489).

18048321 is a wasteful number, since it uses less digits than its factorization.

18048321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005375 (or 2005372 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 18048321 is about 4248.3315548577. The cubic root of 18048321 is about 262.3084425593.

The spelling of 18048321 in words is "eighteen million, forty-eight thousand, three hundred twenty-one".