18054539 has 4 divisors (see below), whose sum is σ = 18474456. Its totient is φ = 17634624.

The previous prime is 18054521. The next prime is 18054577. The reversal of 18054539 is 93545081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18054539 - 2¹² = 18050443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18054499 and 18054508.

It is not an unprimeable number, because it can be changed into a prime (18054599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209894 + ... + 209979.

It is an arithmetic number, because the mean of its divisors is an integer number (4618614).

Almost surely, 2^18054539 is an apocalyptic number.

18054539 is a deficient number, since it is larger than the sum of its proper divisors (419917).

18054539 is an equidigital number, since it uses as much as digits as its factorization.

18054539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419916.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 18054539 is about 4249.0633085422. The cubic root of 18054539 is about 262.3385625655.

The spelling of 18054539 in words is "eighteen million, fifty-four thousand, five hundred thirty-nine".