20708861383601 has 2 divisors, whose sum is σ = 20708861383602. Its totient is φ = 20708861383600.

The previous prime is 20708861383583. The next prime is 20708861383607. The reversal of 20708861383601 is 10638316880702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10841221345201 + 9867640038400 = 3292601^2 + 3141280^2 .

It is a cyclic number.

It is not a de Polignac number, because 20708861383601 - 2⁶ = 20708861383537 is a prime.

It is not a weakly prime, because it can be changed into another prime (20708861383607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10354430691800 + 10354430691801.

It is an arithmetic number, because the mean of its divisors is an integer number (10354430691801).

Almost surely, 2^{20708861383601} is an apocalyptic number.

It is an amenable number.

20708861383601 is a deficient number, since it is larger than the sum of its proper divisors (1).

20708861383601 is an equidigital number, since it uses as much as digits as its factorization.

20708861383601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 20708861383601 in words is "twenty trillion, seven hundred eight billion, eight hundred sixty-one million, three hundred eighty-three thousand, six hundred one".