7321128020 has 24 divisors (see below), whose sum is σ = 15870317568. Its totient is φ = 2833984800.

The previous prime is 7321128019. The next prime is 7321128037. The reversal of 7321128020 is 208211237.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5903516 + ... + 5904755.

It is an arithmetic number, because the mean of its divisors is an integer number (661263232).

Almost surely, 2^7321128020 is an apocalyptic number.

It is an amenable number.

7321128020 is an abundant number, since it is smaller than the sum of its proper divisors (8549189548).

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

7321128020 is a wasteful number, since it uses less digits than its factorization.

7321128020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11808311 (or 11808309 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 7321128020 is about 85563.5905043728. The cubic root of 7321128020 is about 1941.7471082451.

Adding to 7321128020 its reverse (208211237), we get a palindrome (7529339257).

The spelling of 7321128020 in words is "seven billion, three hundred twenty-one million, one hundred twenty-eight thousand, twenty".