2118286538 has 4 divisors (see below), whose sum is σ = 3177429810. Its totient is φ = 1059143268.

The previous prime is 2118286531. The next prime is 2118286543. The reversal of 2118286538 is 8356828112.

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

It can be written as a sum of positive squares in only one way, i.e., 1414286449 + 704000089 = 37607^2 + 26533^2 .

It is not an unprimeable number, because it can be changed into a prime (2118286531) 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 as a sum of consecutive naturals, namely, 529571633 + ... + 529571636.

Almost surely, 2^2118286538 is an apocalyptic number.

2118286538 is a deficient number, since it is larger than the sum of its proper divisors (1059143272).

2118286538 is a wasteful number, since it uses less digits than its factorization.

2118286538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059143271.

The product of its digits is 184320, while the sum is 44.

The square root of 2118286538 is about 46024.8469633523. The cubic root of 2118286538 is about 1284.2854689047.

The spelling of 2118286538 in words is "two billion, one hundred eighteen million, two hundred eighty-six thousand, five hundred thirty-eight".