2143489920 has 512 divisors, whose sum is σ = 8282856960. Its totient is φ = 464486400.

The previous prime is 2143489891. The next prime is 2143489969. The reversal of 2143489920 is 299843412.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10158615 + ... + 10158825.

It is an arithmetic number, because the mean of its divisors is an integer number (16177455).

Almost surely, 2^2143489920 is an apocalyptic number.

2143489920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2143489920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4141428480).

2143489920 is an abundant number, since it is smaller than the sum of its proper divisors (6139367040).

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

2143489920 is a wasteful number, since it uses less digits than its factorization.

2143489920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 2143489920 is about 46297.8392584362. The cubic root of 2143489920 is about 1289.3588785833.

The spelling of 2143489920 in words is "two billion, one hundred forty-three million, four hundred eighty-nine thousand, nine hundred twenty".