2021547713797 has 2 divisors, whose sum is σ = 2021547713798. Its totient is φ = 2021547713796.

The previous prime is 2021547713753. The next prime is 2021547713869. The reversal of 2021547713797 is 7973177451202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1234945460961 + 786602252836 = 1111281^2 + 886906^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021547713797 - 2¹¹ = 2021547711749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021547710797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010773856898 + 1010773856899.

It is an arithmetic number, because the mean of its divisors is an integer number (1010773856899).

Almost surely, 2^{2021547713797} is an apocalyptic number.

It is an amenable number.

2021547713797 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021547713797 is an equidigital number, since it uses as much as digits as its factorization.

2021547713797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5186160, while the sum is 55.

The spelling of 2021547713797 in words is "two trillion, twenty-one billion, five hundred forty-seven million, seven hundred thirteen thousand, seven hundred ninety-seven".