2143920868 has 12 divisors (see below), whose sum is σ = 3752546812. Its totient is φ = 1071764640.

The previous prime is 2143920833. The next prime is 2143920887. The reversal of 2143920868 is 8680293412.

It can be written as a sum of positive squares in 2 ways, for example, as 1700902564 + 443018304 = 41242^2 + 21048^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 22755 + ... + 69322.

Almost surely, 2^2143920868 is an apocalyptic number.

It is an amenable number.

2143920868 is a deficient number, since it is larger than the sum of its proper divisors (1608625944).

2143920868 is a wasteful number, since it uses less digits than its factorization.

2143920868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97902 (or 97900 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 2143920868 is about 46302.4931078230. The cubic root of 2143920868 is about 1289.4452811974.

The spelling of 2143920868 in words is "two billion, one hundred forty-three million, nine hundred twenty thousand, eight hundred sixty-eight".