21010697759 has 2 divisors, whose sum is σ = 21010697760. Its totient is φ = 21010697758.

The previous prime is 21010697753. The next prime is 21010697803. The reversal of 21010697759 is 95779601012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21010697759 - 2²⁰ = 21009649183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21010697753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505348879 + 10505348880.

It is an arithmetic number, because the mean of its divisors is an integer number (10505348880).

Almost surely, 2^21010697759 is an apocalyptic number.

21010697759 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010697759 is an equidigital number, since it uses as much as digits as its factorization.

21010697759 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238140, while the sum is 47.

The spelling of 21010697759 in words is "twenty-one billion, ten million, six hundred ninety-seven thousand, seven hundred fifty-nine".