2143783780 has 24 divisors (see below), whose sum is σ = 4502816640. Its totient is φ = 857347680.

The previous prime is 2143783777. The next prime is 2143783781. The reversal of 2143783780 is 873873412.

It is not an unprimeable number, because it can be changed into a prime (2143783781) 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, 191991 + ... + 202849.

It is an arithmetic number, because the mean of its divisors is an integer number (187617360).

Almost surely, 2^2143783780 is an apocalyptic number.

2143783780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143783780 is an abundant number, since it is smaller than the sum of its proper divisors (2359032860).

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

2143783780 is a wasteful number, since it uses less digits than its factorization.

2143783780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20739 (or 20737 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 2143783780 is about 46301.0127319047. The cubic root of 2143783780 is about 1289.4177970918.

The spelling of 2143783780 in words is "two billion, one hundred forty-three million, seven hundred eighty-three thousand, seven hundred eighty".