2118187164 has 24 divisors (see below), whose sum is σ = 5047596288. Its totient is φ = 691039600.

The previous prime is 2118187163. The next prime is 2118187171. The reversal of 2118187164 is 4617818112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118187163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1877262 + ... + 1878389.

It is an arithmetic number, because the mean of its divisors is an integer number (210316512).

Almost surely, 2^2118187164 is an apocalyptic number.

It is an amenable number.

2118187164 is an abundant number, since it is smaller than the sum of its proper divisors (2929409124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2118187164 is a wasteful number, since it uses less digits than its factorization.

2118187164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755705 (or 3755703 counting only the distinct ones).

The product of its digits is 21504, while the sum is 39.

The square root of 2118187164 is about 46023.7673816475. The cubic root of 2118187164 is about 1284.2653856003.

It can be divided in two parts, 21181 and 87164, that added together give a triangular number (108345 = T₄₆₅).

The spelling of 2118187164 in words is "two billion, one hundred eighteen million, one hundred eighty-seven thousand, one hundred sixty-four".