2118810047 has 4 divisors (see below), whose sum is σ = 2120902680. Its totient is φ = 2116717416.

The previous prime is 2118810019. The next prime is 2118810049. The reversal of 2118810047 is 7400188112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2118810047 - 2¹⁸ = 2118547903 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2118809995 and 2118810022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118810049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1044797 + ... + 1046822.

It is an arithmetic number, because the mean of its divisors is an integer number (530225670).

Almost surely, 2^2118810047 is an apocalyptic number.

2118810047 is a deficient number, since it is larger than the sum of its proper divisors (2092633).

2118810047 is a wasteful number, since it uses less digits than its factorization.

2118810047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092632.

The product of its (nonzero) digits is 3584, while the sum is 32.

The square root of 2118810047 is about 46030.5338552574. The cubic root of 2118810047 is about 1284.3912587511.

Adding to 2118810047 its reverse (7400188112), we get a palindrome (9518998159).

The spelling of 2118810047 in words is "two billion, one hundred eighteen million, eight hundred ten thousand, forty-seven".