21086563650059 has 2 divisors, whose sum is σ = 21086563650060. Its totient is φ = 21086563650058.

The previous prime is 21086563650013. The next prime is 21086563650067. The reversal of 21086563650059 is 95005636568012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21086563650059 - 2⁴⁰ = 19987052022283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21086563649986 and 21086563650013.

It is not a weakly prime, because it can be changed into another prime (21086563650959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10543281825029 + 10543281825030.

It is an arithmetic number, because the mean of its divisors is an integer number (10543281825030).

Almost surely, 2^{21086563650059} is an apocalyptic number.

21086563650059 is a deficient number, since it is larger than the sum of its proper divisors (1).

21086563650059 is an equidigital number, since it uses as much as digits as its factorization.

21086563650059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664000, while the sum is 56.

The spelling of 21086563650059 in words is "twenty-one trillion, eighty-six billion, five hundred sixty-three million, six hundred fifty thousand, fifty-nine".