2130781868 has 6 divisors (see below), whose sum is σ = 3728868276. Its totient is φ = 1065390932.

The previous prime is 2130781867. The next prime is 2130781871. The reversal of 2130781868 is 8681870312.

It is not an unprimeable number, because it can be changed into a prime (2130781867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266347730 + ... + 266347737.

It is an arithmetic number, because the mean of its divisors is an integer number (621478046).

Almost surely, 2^2130781868 is an apocalyptic number.

It is an amenable number.

2130781868 is a deficient number, since it is larger than the sum of its proper divisors (1598086408).

2130781868 is a wasteful number, since it uses less digits than its factorization.

2130781868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532695471 (or 532695469 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 2130781868 is about 46160.3928492815. The cubic root of 2130781868 is about 1286.8057637601.

The spelling of 2130781868 in words is "two billion, one hundred thirty million, seven hundred eighty-one thousand, eight hundred sixty-eight".