7006421821 has 8 divisors (see below), whose sum is σ = 8047987200. Its totient is φ = 5975018448.

The previous prime is 7006421819. The next prime is 7006421881. The reversal of 7006421821 is 1281246007.

7006421821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7006421821 - 2¹ = 7006421819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7006421881) 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 7 ways as a sum of consecutive naturals, for example, 2539021 + ... + 2541778.

It is an arithmetic number, because the mean of its divisors is an integer number (1005998400).

Almost surely, 2^7006421821 is an apocalyptic number.

It is an amenable number.

7006421821 is a deficient number, since it is larger than the sum of its proper divisors (1041565379).

7006421821 is a wasteful number, since it uses less digits than its factorization.

7006421821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5081003.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 7006421821 is about 83704.3715763998. The cubic root of 7006421821 is about 1913.5159802458.

Adding to 7006421821 its reverse (1281246007), we get a palindrome (8287667828).

The spelling of 7006421821 in words is "seven billion, six million, four hundred twenty-one thousand, eight hundred twenty-one".