2118731139 has 36 divisors (see below), whose sum is σ = 3564642744. Its totient is φ = 1209140352.

The previous prime is 2118731119. The next prime is 2118731149. The reversal of 2118731139 is 9311378112.

It is not a de Polignac number, because 2118731139 - 2⁵ = 2118731107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2118731119) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 397339 + ... + 402635.

It is an arithmetic number, because the mean of its divisors is an integer number (99017854).

Almost surely, 2^2118731139 is an apocalyptic number.

2118731139 is a deficient number, since it is larger than the sum of its proper divisors (1445911605).

2118731139 is a wasteful number, since it uses less digits than its factorization.

2118731139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6224 (or 6214 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 2118731139 is about 46029.6767205680. The cubic root of 2118731139 is about 1284.3753142664.

It can be divided in two parts, 21187 and 31139, that added together give a triangular number (52326 = T₃₂₃).

The spelling of 2118731139 in words is "two billion, one hundred eighteen million, seven hundred thirty-one thousand, one hundred thirty-nine".