9876543021 has 24 divisors (see below), whose sum is σ = 15101280480. Its totient is φ = 6209463456.

The previous prime is 9876542933. The next prime is 9876543029. The reversal of 9876543021 is 1203456789.

9876543021 is a `hidden beast` number, since 9 + 87 + 6 + 543 + 0 + 21 = 666.

9876543021 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-9876543021 is a prime.

It is a super-2 number, since 2×9876543021² (a number of 21 digits) contains 22 as substring.

9876543021 is strictly pandigital in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9876543029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 428791 + ... + 451236.

It is an arithmetic number, because the mean of its divisors is an integer number (629220020).

It is a 2-persistent number, because it is pandigital, and so is 2⋅9876543021 = 19753086042, but 3⋅9876543021 = 29629629063 is not.

Almost surely, 2^9876543021 is an apocalyptic number.

It is an amenable number.

9876543021 is a deficient number, since it is larger than the sum of its proper divisors (5224737459).

9876543021 is a wasteful number, since it uses less digits than its factorization.

9876543021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880105 (or 880102 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 9876543021 is about 99380.7980497239. The cubic root of 9876543021 is about 2145.5319521134.

The spelling of 9876543021 in words is "nine billion, eight hundred seventy-six million, five hundred forty-three thousand, twenty-one".