9980123920 has 80 divisors (see below), whose sum is σ = 26303941440. Its totient is φ = 3491016192.

The previous prime is 9980123917. The next prime is 9980123927. The reversal of 9980123920 is 293210899.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (9980123927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232774 + ... + 272293.

It is an arithmetic number, because the mean of its divisors is an integer number (328799268).

Almost surely, 2^9980123920 is an apocalyptic number.

It is an amenable number.

9980123920 is an abundant number, since it is smaller than the sum of its proper divisors (16323817520).

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

9980123920 is a wasteful number, since it uses less digits than its factorization.

9980123920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505112 (or 505106 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 9980123920 is about 99900.5701685431. The cubic root of 9980123920 is about 2153.0063527468.

The spelling of 9980123920 in words is "nine billion, nine hundred eighty million, one hundred twenty-three thousand, nine hundred twenty".