2021547713869 has 2 divisors, whose sum is σ = 2021547713870. Its totient is φ = 2021547713868.

The previous prime is 2021547713797. The next prime is 2021547713879. The reversal of 2021547713869 is 9683177451202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1713258477225 + 308289236644 = 1308915^2 + 555238^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021547713869 - 2⁷ = 2021547713741 is a prime.

It is a super-2 number, since 2×2021547713869² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021547713879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010773856934 + 1010773856935.

It is an arithmetic number, because the mean of its divisors is an integer number (1010773856935).

It is a 1-persistent number, because it is pandigital, but 2⋅2021547713869 = 4043095427738 is not.

Almost surely, 2^{2021547713869} is an apocalyptic number.

It is an amenable number.

2021547713869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021547713869 is an equidigital number, since it uses as much as digits as its factorization.

2021547713869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 2021547713869 in words is "two trillion, twenty-one billion, five hundred forty-seven million, seven hundred thirteen thousand, eight hundred sixty-nine".