2143800920 has 16 divisors (see below), whose sum is σ = 4823552160. Its totient is φ = 857520352.

The previous prime is 2143800889. The next prime is 2143800973. The reversal of 2143800920 is 290083412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26797472 + ... + 26797551.

It is an arithmetic number, because the mean of its divisors is an integer number (301472010).

Almost surely, 2^2143800920 is an apocalyptic number.

2143800920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143800920 is an abundant number, since it is smaller than the sum of its proper divisors (2679751240).

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

2143800920 is a wasteful number, since it uses less digits than its factorization.

2143800920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53595034 (or 53595030 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 2143800920 is about 46301.1978246784. The cubic root of 2143800920 is about 1289.4212334710.

The spelling of 2143800920 in words is "two billion, one hundred forty-three million, eight hundred thousand, nine hundred twenty".