2121672686 has 32 divisors (see below), whose sum is σ = 3723840000. Its totient is φ = 887825952.

The previous prime is 2121672673. The next prime is 2121672703. The reversal of 2121672686 is 6862761212.

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, 114455 + ... + 131693.

It is an arithmetic number, because the mean of its divisors is an integer number (116370000).

Almost surely, 2^2121672686 is an apocalyptic number.

2121672686 is a deficient number, since it is larger than the sum of its proper divisors (1602167314).

2121672686 is a wasteful number, since it uses less digits than its factorization.

2121672686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17456.

The product of its digits is 96768, while the sum is 41.

The square root of 2121672686 is about 46061.6183606265. The cubic root of 2121672686 is about 1284.9694282320.

The spelling of 2121672686 in words is "two billion, one hundred twenty-one million, six hundred seventy-two thousand, six hundred eighty-six".