18539484242 has 8 divisors (see below), whose sum is σ = 27909621516. Its totient is φ = 9236277072.

The previous prime is 18539484241. The next prime is 18539484253. The reversal of 18539484242 is 24248493581.

It can be written as a sum of positive squares in 2 ways, for example, as 18382207561 + 157276681 = 135581^2 + 12541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18539484241) 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 3 ways as a sum of consecutive naturals, for example, 16731833 + ... + 16732940.

Almost surely, 2^18539484242 is an apocalyptic number.

18539484242 is a deficient number, since it is larger than the sum of its proper divisors (9370137274).

18539484242 is a wasteful number, since it uses less digits than its factorization.

18539484242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33465052.

The product of its digits is 2211840, while the sum is 50.

The spelling of 18539484242 in words is "eighteen billion, five hundred thirty-nine million, four hundred eighty-four thousand, two hundred forty-two".