9980376021 has 24 divisors (see below), whose sum is σ = 17973319104. Its totient is φ = 5184610560.

The previous prime is 9980376017. The next prime is 9980376053. The reversal of 9980376021 is 1206730899.

9980376021 is a `hidden beast` number, since 9 + 9 + 8 + 0 + 37 + 602 + 1 = 666.

9980376021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9980376021 - 2² = 9980376017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9980376001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7200156 + ... + 7201541.

It is an arithmetic number, because the mean of its divisors is an integer number (748888296).

Almost surely, 2^9980376021 is an apocalyptic number.

It is an amenable number.

9980376021 is a deficient number, since it is larger than the sum of its proper divisors (7992943083).

9980376021 is a wasteful number, since it uses less digits than its factorization.

9980376021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14401721 (or 14401718 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 9980376021 is about 99901.8319201405. The cubic root of 9980376021 is about 2153.0244811284.

The spelling of 9980376021 in words is "nine billion, nine hundred eighty million, three hundred seventy-six thousand, twenty-one".