21041076538673 has 2 divisors, whose sum is σ = 21041076538674. Its totient is φ = 21041076538672.

The previous prime is 21041076538649. The next prime is 21041076538697. The reversal of 21041076538673 is 37683567014012.

It is a balanced prime because it is at equal distance from previous prime (21041076538649) and next prime (21041076538697).

It can be written as a sum of positive squares in only one way, i.e., 16996762480369 + 4044314058304 = 4122713^2 + 2011048^2 .

It is a cyclic number.

It is not a de Polignac number, because 21041076538673 - 2³⁰ = 21040002796849 is a prime.

It is not a weakly prime, because it can be changed into another prime (21041076538613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10520538269336 + 10520538269337.

It is an arithmetic number, because the mean of its divisors is an integer number (10520538269337).

Almost surely, 2^{21041076538673} is an apocalyptic number.

It is an amenable number.

21041076538673 is a deficient number, since it is larger than the sum of its proper divisors (1).

21041076538673 is an equidigital number, since it uses as much as digits as its factorization.

21041076538673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 21041076538673 in words is "twenty-one trillion, forty-one billion, seventy-six million, five hundred thirty-eight thousand, six hundred seventy-three".