9820065988 has 12 divisors (see below), whose sum is σ = 17194140432. Its totient is φ = 4907454440.

The previous prime is 9820065949. The next prime is 9820066027. The reversal of 9820065988 is 8895600289.

It is an interprime number because it is at equal distance from previous prime (9820065949) and next prime (9820066027).

It is a super-2 number, since 2×9820065988² (a number of 21 digits) contains 22 as substring.

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, 636058 + ... + 651313.

It is an arithmetic number, because the mean of its divisors is an integer number (1432845036).

Almost surely, 2^9820065988 is an apocalyptic number.

It is an amenable number.

9820065988 is a deficient number, since it is larger than the sum of its proper divisors (7374074444).

9820065988 is a wasteful number, since it uses less digits than its factorization.

9820065988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289282 (or 1289280 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 55.

The square root of 9820065988 is about 99096.2460842993. The cubic root of 9820065988 is about 2141.4345338320.

The spelling of 9820065988 in words is "nine billion, eight hundred twenty million, sixty-five thousand, nine hundred eighty-eight".