2121454896 has 80 divisors (see below), whose sum is σ = 5985688320. Its totient is φ = 642108160.

The previous prime is 2121454883. The next prime is 2121454897. The reversal of 2121454896 is 6984541212.

It is not an unprimeable number, because it can be changed into a prime (2121454897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 583741 + ... + 587363.

It is an arithmetic number, because the mean of its divisors is an integer number (74821104).

Almost surely, 2^2121454896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121454896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2992844160).

2121454896 is an abundant number, since it is smaller than the sum of its proper divisors (3864233424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121454896 is a wasteful number, since it uses less digits than its factorization.

2121454896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754 (or 4748 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 2121454896 is about 46059.2541841485. The cubic root of 2121454896 is about 1284.9254592965.

The spelling of 2121454896 in words is "two billion, one hundred twenty-one million, four hundred fifty-four thousand, eight hundred ninety-six".