2118402815 has 16 divisors (see below), whose sum is σ = 2719751520. Its totient is φ = 1579201920.

The previous prime is 2118402757. The next prime is 2118402857. The reversal of 2118402815 is 5182048112.

It is not a de Polignac number, because 2118402815 - 2¹² = 2118398719 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176984 + ... + 188573.

It is an arithmetic number, because the mean of its divisors is an integer number (169984470).

Almost surely, 2^2118402815 is an apocalyptic number.

2118402815 is a deficient number, since it is larger than the sum of its proper divisors (601348705).

2118402815 is a wasteful number, since it uses less digits than its factorization.

2118402815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365642.

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 2118402815 is about 46026.1101441345. The cubic root of 2118402815 is about 1284.3089674772.

The spelling of 2118402815 in words is "two billion, one hundred eighteen million, four hundred two thousand, eight hundred fifteen".