2181136924 has 48 divisors (see below), whose sum is σ = 4111884000. Its totient is φ = 1008654336.

The previous prime is 2181136871. The next prime is 2181136949. The reversal of 2181136924 is 4296311812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1731807 + ... + 1733065.

It is an arithmetic number, because the mean of its divisors is an integer number (85664250).

Almost surely, 2^2181136924 is an apocalyptic number.

It is an amenable number.

2181136924 is a deficient number, since it is larger than the sum of its proper divisors (1930747076).

2181136924 is a wasteful number, since it uses less digits than its factorization.

2181136924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702 (or 1700 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 2181136924 is about 46702.6436510825. The cubic root of 2181136924 is about 1296.8636274565.

The spelling of 2181136924 in words is "two billion, one hundred eighty-one million, one hundred thirty-six thousand, nine hundred twenty-four".