21708326636041 has 2 divisors, whose sum is σ = 21708326636042. Its totient is φ = 21708326636040.

The previous prime is 21708326636023. The next prime is 21708326636081. The reversal of 21708326636041 is 14063662380712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20842840636816 + 865485999225 = 4565396^2 + 930315^2 .

It is a cyclic number.

It is not a de Polignac number, because 21708326636041 - 2⁷ = 21708326635913 is a prime.

It is not a weakly prime, because it can be changed into another prime (21708326636081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10854163318020 + 10854163318021.

It is an arithmetic number, because the mean of its divisors is an integer number (10854163318021).

Almost surely, 2^{21708326636041} is an apocalyptic number.

It is an amenable number.

21708326636041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21708326636041 is an equidigital number, since it uses as much as digits as its factorization.

21708326636041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 49.

It can be divided in two parts, 217083 and 26636041, that added together give a square (26853124 = 5182²).

The spelling of 21708326636041 in words is "twenty-one trillion, seven hundred eight billion, three hundred twenty-six million, six hundred thirty-six thousand, forty-one".