2108818815 has 16 divisors (see below), whose sum is σ = 3376467168. Its totient is φ = 1123917696.

The previous prime is 2108818787. The next prime is 2108818837. The reversal of 2108818815 is 5188188012.

It is not a de Polignac number, because 2108818815 - 2¹⁵ = 2108786047 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 26584 + ... + 70173.

It is an arithmetic number, because the mean of its divisors is an integer number (211029198).

Almost surely, 2^2108818815 is an apocalyptic number.

2108818815 is a deficient number, since it is larger than the sum of its proper divisors (1267648353).

2108818815 is a wasteful number, since it uses less digits than its factorization.

2108818815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98218.

The product of its (nonzero) digits is 40960, while the sum is 42.

The square root of 2108818815 is about 45921.8773026539. The cubic root of 2108818815 is about 1282.3692315247.

It can be divided in two parts, 21088 and 18815, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 2108818815 in words is "two billion, one hundred eight million, eight hundred eighteen thousand, eight hundred fifteen".