2129980186 has 8 divisors (see below), whose sum is σ = 3195199764. Its totient is φ = 1064913600.

The previous prime is 2129980141. The next prime is 2129980187. The reversal of 2129980186 is 6810899212.

It can be written as a sum of positive squares in 2 ways, for example, as 1901396025 + 228584161 = 43605^2 + 15119^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2129980187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7506 + ... + 65698.

Almost surely, 2^2129980186 is an apocalyptic number.

2129980186 is a deficient number, since it is larger than the sum of its proper divisors (1065219578).

2129980186 is a wasteful number, since it uses less digits than its factorization.

2129980186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76496.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 2129980186 is about 46151.7083757470. The cubic root of 2129980186 is about 1286.6443615947.

The spelling of 2129980186 in words is "two billion, one hundred twenty-nine million, nine hundred eighty thousand, one hundred eighty-six".