21765586083047 has 2 divisors, whose sum is σ = 21765586083048. Its totient is φ = 21765586083046.

The previous prime is 21765586083013. The next prime is 21765586083053. The reversal of 21765586083047 is 74038068556712.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21765586083047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21765586083067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10882793041523 + 10882793041524.

It is an arithmetic number, because the mean of its divisors is an integer number (10882793041524).

Almost surely, 2^{21765586083047} is an apocalyptic number.

21765586083047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21765586083047 is an equidigital number, since it uses as much as digits as its factorization.

21765586083047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67737600, while the sum is 62.

The spelling of 21765586083047 in words is "twenty-one trillion, seven hundred sixty-five billion, five hundred eighty-six million, eighty-three thousand, forty-seven".