21835035200813 has 2 divisors, whose sum is σ = 21835035200814. Its totient is φ = 21835035200812.

The previous prime is 21835035200689. The next prime is 21835035200819. The reversal of 21835035200813 is 31800253053812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20130853774564 + 1704181426249 = 4486742^2 + 1305443^2 .

It is a cyclic number.

It is not a de Polignac number, because 21835035200813 - 2⁸ = 21835035200557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21835035200819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10917517600406 + 10917517600407.

It is an arithmetic number, because the mean of its divisors is an integer number (10917517600407).

Almost surely, 2^{21835035200813} is an apocalyptic number.

It is an amenable number.

21835035200813 is a deficient number, since it is larger than the sum of its proper divisors (1).

21835035200813 is an equidigital number, since it uses as much as digits as its factorization.

21835035200813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 21835035200813 in words is "twenty-one trillion, eight hundred thirty-five billion, thirty-five million, two hundred thousand, eight hundred thirteen".