20201686510853 has 2 divisors, whose sum is σ = 20201686510854. Its totient is φ = 20201686510852.

The previous prime is 20201686510847. The next prime is 20201686510861. The reversal of 20201686510853 is 35801568610202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19211548077604 + 990138433249 = 4383098^2 + 995057^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201686510853 - 2¹⁴ = 20201686494469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20201686510798 and 20201686510807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201686510823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100843255426 + 10100843255427.

It is an arithmetic number, because the mean of its divisors is an integer number (10100843255427).

Almost surely, 2^{20201686510853} is an apocalyptic number.

It is an amenable number.

20201686510853 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201686510853 is an equidigital number, since it uses as much as digits as its factorization.

20201686510853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 20201686510853 in words is "twenty trillion, two hundred one billion, six hundred eighty-six million, five hundred ten thousand, eight hundred fifty-three".