7020820913 has 2 divisors, whose sum is σ = 7020820914. Its totient is φ = 7020820912.

The previous prime is 7020820903. The next prime is 7020820921. The reversal of 7020820913 is 3190280207.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6264405904 + 756415009 = 79148^2 + 27503^2 .

It is an emirp because it is prime and its reverse (3190280207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7020820913 - 2¹⁰ = 7020819889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7020820913.

It is not a weakly prime, because it can be changed into another prime (7020820903) 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 as a sum of consecutive naturals, namely, 3510410456 + 3510410457.

It is an arithmetic number, because the mean of its divisors is an integer number (3510410457).

Almost surely, 2^7020820913 is an apocalyptic number.

It is an amenable number.

7020820913 is a deficient number, since it is larger than the sum of its proper divisors (1).

7020820913 is an equidigital number, since it uses as much as digits as its factorization.

7020820913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 7020820913 is about 83790.3390194836. The cubic root of 7020820913 is about 1914.8259232268.

The spelling of 7020820913 in words is "seven billion, twenty million, eight hundred twenty thousand, nine hundred thirteen".