2121719384 has 16 divisors (see below), whose sum is σ = 3986935800. Its totient is φ = 1058536512.

The previous prime is 2121719381. The next prime is 2121719401. The reversal of 2121719384 is 4839171212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121719381) 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, 286514 + ... + 293825.

Almost surely, 2^2121719384 is an apocalyptic number.

It is an amenable number.

2121719384 is a deficient number, since it is larger than the sum of its proper divisors (1865216416).

2121719384 is a wasteful number, since it uses less digits than its factorization.

2121719384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580802 (or 580798 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 2121719384 is about 46062.1252657756. The cubic root of 2121719384 is about 1284.9788555520.

The spelling of 2121719384 in words is "two billion, one hundred twenty-one million, seven hundred nineteen thousand, three hundred eighty-four".