2118815434 has 32 divisors (see below), whose sum is σ = 3514829760. Its totient is φ = 953664768.

The previous prime is 2118815431. The next prime is 2118815443. The reversal of 2118815434 is 4345188112.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 2118815393 and 2118815402.

It is not an unprimeable number, because it can be changed into a prime (2118815431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59949 + ... + 88495.

It is an arithmetic number, because the mean of its divisors is an integer number (109838430).

Almost surely, 2^2118815434 is an apocalyptic number.

2118815434 is a deficient number, since it is larger than the sum of its proper divisors (1396014326).

2118815434 is a wasteful number, since it uses less digits than its factorization.

2118815434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28662.

The product of its digits is 30720, while the sum is 37.

The square root of 2118815434 is about 46030.5923707267. The cubic root of 2118815434 is about 1284.3923472567.

The spelling of 2118815434 in words is "two billion, one hundred eighteen million, eight hundred fifteen thousand, four hundred thirty-four".