18054561 has 32 divisors (see below), whose sum is σ = 29472768. Its totient is φ = 9596160.

The previous prime is 18054521. The next prime is 18054577. The reversal of 18054561 is 16545081.

It is not a de Polignac number, because 18054561 - 2⁶ = 18054497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18054511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36526 + ... + 37016.

It is an arithmetic number, because the mean of its divisors is an integer number (921024).

Almost surely, 2^18054561 is an apocalyptic number.

It is an amenable number.

18054561 is a deficient number, since it is larger than the sum of its proper divisors (11418207).

18054561 is a wasteful number, since it uses less digits than its factorization.

18054561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 18054561 is about 4249.0658973473. The cubic root of 18054561 is about 262.3386691213.

The spelling of 18054561 in words is "eighteen million, fifty-four thousand, five hundred sixty-one".