20201686510847 has 2 divisors, whose sum is σ = 20201686510848. Its totient is φ = 20201686510846.

The previous prime is 20201686510823. The next prime is 20201686510853. The reversal of 20201686510847 is 74801568610202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20201686510847 - 2¹² = 20201686506751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20201686510795 and 20201686510804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201686510867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100843255423 + 10100843255424.

It is an arithmetic number, because the mean of its divisors is an integer number (10100843255424).

Almost surely, 2^{20201686510847} is an apocalyptic number.

20201686510847 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201686510847 is an equidigital number, since it uses as much as digits as its factorization.

20201686510847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 20201686510847 in words is "twenty trillion, two hundred one billion, six hundred eighty-six million, five hundred ten thousand, eight hundred forty-seven".