9992820843 has 48 divisors (see below), whose sum is σ = 15030752256. Its totient is φ = 6392105280.

The previous prime is 9992820839. The next prime is 9992820853. The reversal of 9992820843 is 3480282999.

It is a happy number.

It is not a de Polignac number, because 9992820843 - 2² = 9992820839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9992820843.

It is not an unprimeable number, because it can be changed into a prime (9992820853) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10083078 + ... + 10084068.

It is an arithmetic number, because the mean of its divisors is an integer number (313140672).

Almost surely, 2^9992820843 is an apocalyptic number.

9992820843 is a deficient number, since it is larger than the sum of its proper divisors (5037931413).

9992820843 is a wasteful number, since it uses less digits than its factorization.

9992820843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424 (or 1421 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The square root of 9992820843 is about 99964.0977701495. The cubic root of 9992820843 is about 2153.9189991085.

The spelling of 9992820843 in words is "nine billion, nine hundred ninety-two million, eight hundred twenty thousand, eight hundred forty-three".