6821020373 has 2 divisors, whose sum is σ = 6821020374. Its totient is φ = 6821020372.

The previous prime is 6821020319. The next prime is 6821020403. The reversal of 6821020373 is 3730201286.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5229169969 + 1591850404 = 72313^2 + 39898^2 .

It is a cyclic number.

It is not a de Polignac number, because 6821020373 - 2¹⁰ = 6821019349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6821020573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3410510186 + 3410510187.

It is an arithmetic number, because the mean of its divisors is an integer number (3410510187).

Almost surely, 2^6821020373 is an apocalyptic number.

It is an amenable number.

6821020373 is a deficient number, since it is larger than the sum of its proper divisors (1).

6821020373 is an equidigital number, since it uses as much as digits as its factorization.

6821020373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 6821020373 is about 82589.4688988856. The cubic root of 6821020373 is about 1896.4866164677.

The spelling of 6821020373 in words is "six billion, eight hundred twenty-one million, twenty thousand, three hundred seventy-three".