2129180873 has 16 divisors (see below), whose sum is σ = 2250808704. Its totient is φ = 2011806720.

The previous prime is 2129180813. The next prime is 2129180891. The reversal of 2129180873 is 3780819212.

It is a cyclic number.

It is not a de Polignac number, because 2129180873 - 2⁸ = 2129180617 is a prime.

It is a super-2 number, since 2×2129180873² = 9066822379898084258, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2129180873.

It is not an unprimeable number, because it can be changed into a prime (2129180813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169961 + ... + 182057.

It is an arithmetic number, because the mean of its divisors is an integer number (140675544).

Almost surely, 2^2129180873 is an apocalyptic number.

It is an amenable number.

2129180873 is a deficient number, since it is larger than the sum of its proper divisors (121627831).

2129180873 is a wasteful number, since it uses less digits than its factorization.

2129180873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12272.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 2129180873 is about 46143.0479379072. The cubic root of 2129180873 is about 1286.4833960540.

The spelling of 2129180873 in words is "two billion, one hundred twenty-nine million, one hundred eighty thousand, eight hundred seventy-three".