218538836339 has 16 divisors (see below), whose sum is σ = 234310164480. Its totient is φ = 203105064960.

The previous prime is 218538836287. The next prime is 218538836389. The reversal of 218538836339 is 933638835812.

218538836339 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218538836339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218538836389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305294 + ... + 728204.

It is an arithmetic number, because the mean of its divisors is an integer number (14644385280).

Almost surely, 2^218538836339 is an apocalyptic number.

218538836339 is a deficient number, since it is larger than the sum of its proper divisors (15771328141).

218538836339 is a wasteful number, since it uses less digits than its factorization.

218538836339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423310.

The product of its digits is 22394880, while the sum is 59.

The spelling of 218538836339 in words is "two hundred eighteen billion, five hundred thirty-eight million, eight hundred thirty-six thousand, three hundred thirty-nine".