21835035200689 has 2 divisors, whose sum is σ = 21835035200690. Its totient is φ = 21835035200688.

The previous prime is 21835035200681. The next prime is 21835035200813. The reversal of 21835035200689 is 98600253053812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17401412250000 + 4433622950689 = 4171500^2 + 2105617^2 .

It is a cyclic number.

It is not a de Polignac number, because 21835035200689 - 2³ = 21835035200681 is a prime.

It is not a weakly prime, because it can be changed into another prime (21835035200681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10917517600344 + 10917517600345.

It is an arithmetic number, because the mean of its divisors is an integer number (10917517600345).

Almost surely, 2^{21835035200689} is an apocalyptic number.

It is an amenable number.

21835035200689 is a deficient number, since it is larger than the sum of its proper divisors (1).

21835035200689 is an equidigital number, since it uses as much as digits as its factorization.

21835035200689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 21835035200689 in words is "twenty-one trillion, eight hundred thirty-five billion, thirty-five million, two hundred thousand, six hundred eighty-nine".