21052671245759 has 2 divisors, whose sum is σ = 21052671245760. Its totient is φ = 21052671245758.

The previous prime is 21052671245719. The next prime is 21052671245777. The reversal of 21052671245759 is 95754217625012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21052671245759 - 2²⁴ = 21052654468543 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21052671245719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10526335622879 + 10526335622880.

It is an arithmetic number, because the mean of its divisors is an integer number (10526335622880).

Almost surely, 2^{21052671245759} is an apocalyptic number.

21052671245759 is a deficient number, since it is larger than the sum of its proper divisors (1).

21052671245759 is an equidigital number, since it uses as much as digits as its factorization.

21052671245759 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584000, while the sum is 56.

The spelling of 21052671245759 in words is "twenty-one trillion, fifty-two billion, six hundred seventy-one million, two hundred forty-five thousand, seven hundred fifty-nine".