20715335861063 has 2 divisors, whose sum is σ = 20715335861064. Its totient is φ = 20715335861062.

The previous prime is 20715335861039. The next prime is 20715335861071. The reversal of 20715335861063 is 36016853351702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20715335861063 - 2¹⁰ = 20715335860039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20715335861863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10357667930531 + 10357667930532.

It is an arithmetic number, because the mean of its divisors is an integer number (10357667930532).

Almost surely, 2^{20715335861063} is an apocalyptic number.

20715335861063 is a deficient number, since it is larger than the sum of its proper divisors (1).

20715335861063 is an equidigital number, since it uses as much as digits as its factorization.

20715335861063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 50.

The spelling of 20715335861063 in words is "twenty trillion, seven hundred fifteen billion, three hundred thirty-five million, eight hundred sixty-one thousand, sixty-three".