18484139539 has 2 divisors, whose sum is σ = 18484139540. Its totient is φ = 18484139538.

The previous prime is 18484139537. The next prime is 18484139587. The reversal of 18484139539 is 93593148481.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18484139539 - 2¹ = 18484139537 is a prime.

Together with 18484139537, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18484139539.

It is not a weakly prime, because it can be changed into another prime (18484139537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9242069769 + 9242069770.

It is an arithmetic number, because the mean of its divisors is an integer number (9242069770).

Almost surely, 2^18484139539 is an apocalyptic number.

18484139539 is a deficient number, since it is larger than the sum of its proper divisors (1).

18484139539 is an equidigital number, since it uses as much as digits as its factorization.

18484139539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 55.

The spelling of 18484139539 in words is "eighteen billion, four hundred eighty-four million, one hundred thirty-nine thousand, five hundred thirty-nine".