2146644021 has 8 divisors (see below), whose sum is σ = 2904911584. Its totient is φ = 1409736240.

The previous prime is 2146644013. The next prime is 2146644037. The reversal of 2146644021 is 1204466412.

It is a happy number.

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

It is not a de Polignac number, because 2146644021 - 2³ = 2146644013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2146644021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2146644041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5339710 + ... + 5340111.

It is an arithmetic number, because the mean of its divisors is an integer number (363113948).

Almost surely, 2^2146644021 is an apocalyptic number.

It is an amenable number.

2146644021 is a deficient number, since it is larger than the sum of its proper divisors (758267563).

2146644021 is a wasteful number, since it uses less digits than its factorization.

2146644021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10679891.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 2146644021 is about 46331.8898923841. The cubic root of 2146644021 is about 1289.9909902622.

The spelling of 2146644021 in words is "two billion, one hundred forty-six million, six hundred forty-four thousand, twenty-one".