21200859853 has 2 divisors, whose sum is σ = 21200859854. Its totient is φ = 21200859852.

The previous prime is 21200859847. The next prime is 21200859859. The reversal of 21200859853 is 35895800212.

It is a balanced prime because it is at equal distance from previous prime (21200859847) and next prime (21200859859).

It can be written as a sum of positive squares in only one way, i.e., 21198777604 + 2082249 = 145598^2 + 1443^2 .

It is a cyclic number.

It is not a de Polignac number, because 21200859853 - 2⁵ = 21200859821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200859859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600429926 + 10600429927.

It is an arithmetic number, because the mean of its divisors is an integer number (10600429927).

Almost surely, 2^21200859853 is an apocalyptic number.

It is an amenable number.

21200859853 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200859853 is an equidigital number, since it uses as much as digits as its factorization.

21200859853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 21200859853 in words is "twenty-one billion, two hundred million, eight hundred fifty-nine thousand, eight hundred fifty-three".