84202018709 has 2 divisors, whose sum is σ = 84202018710. Its totient is φ = 84202018708.

The previous prime is 84202018679. The next prime is 84202018717. The reversal of 84202018709 is 90781020248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80271355684 + 3930663025 = 283322^2 + 62695^2 .

It is a cyclic number.

It is not a de Polignac number, because 84202018709 - 2³⁶ = 15482541973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84202018409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42101009354 + 42101009355.

It is an arithmetic number, because the mean of its divisors is an integer number (42101009355).

Almost surely, 2^84202018709 is an apocalyptic number.

It is an amenable number.

84202018709 is a deficient number, since it is larger than the sum of its proper divisors (1).

84202018709 is an equidigital number, since it uses as much as digits as its factorization.

84202018709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 84202018709 in words is "eighty-four billion, two hundred two million, eighteen thousand, seven hundred nine".