2018844978239 has 8 divisors (see below), whose sum is σ = 2037742852608. Its totient is φ = 1999947662680.

The previous prime is 2018844978229. The next prime is 2018844978281. The reversal of 2018844978239 is 9328794488102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2018844978239 is a prime.

It is a super-2 number, since 2×2018844978239² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2018844978229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12165554 + ... + 12330384.

It is an arithmetic number, because the mean of its divisors is an integer number (254717856576).

Almost surely, 2^{2018844978239} is an apocalyptic number.

2018844978239 is a deficient number, since it is larger than the sum of its proper divisors (18897874369).

2018844978239 is a wasteful number, since it uses less digits than its factorization.

2018844978239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279405.

The product of its (nonzero) digits is 55738368, while the sum is 65.

The spelling of 2018844978239 in words is "two trillion, eighteen billion, eight hundred forty-four million, nine hundred seventy-eight thousand, two hundred thirty-nine".