2118180771 has 36 divisors (see below), whose sum is σ = 3619488600. Its totient is φ = 1189859328.

The previous prime is 2118180769. The next prime is 2118180809. The reversal of 2118180771 is 1770818112.

It is not a de Polignac number, because 2118180771 - 2¹ = 2118180769 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118180751) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14686 + ... + 66723.

It is an arithmetic number, because the mean of its divisors is an integer number (100541350).

Almost surely, 2^2118180771 is an apocalyptic number.

2118180771 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2118180771 is a deficient number, since it is larger than the sum of its proper divisors (1501307829).

2118180771 is a wasteful number, since it uses less digits than its factorization.

2118180771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81488 (or 81478 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 36.

The square root of 2118180771 is about 46023.6979283499. The cubic root of 2118180771 is about 1284.2640935652.

Adding to 2118180771 its reverse (1770818112), we get a palindrome (3888998883).

The spelling of 2118180771 in words is "two billion, one hundred eighteen million, one hundred eighty thousand, seven hundred seventy-one".