2131818188 has 12 divisors (see below), whose sum is σ = 3859326240. Its totient is φ = 1029153552.

The previous prime is 2131818109. The next prime is 2131818191. The reversal of 2131818188 is 8818181312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9188756 + ... + 9188987.

It is an arithmetic number, because the mean of its divisors is an integer number (321610520).

Almost surely, 2^2131818188 is an apocalyptic number.

It is an amenable number.

2131818188 is a deficient number, since it is larger than the sum of its proper divisors (1727508052).

2131818188 is a wasteful number, since it uses less digits than its factorization.

2131818188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18377776 (or 18377774 counting only the distinct ones).

The product of its digits is 24576, while the sum is 41.

The square root of 2131818188 is about 46171.6166925093. The cubic root of 2131818188 is about 1287.0143454760.

The spelling of 2131818188 in words is "two billion, one hundred thirty-one million, eight hundred eighteen thousand, one hundred eighty-eight".