21996285744029 has 2 divisors, whose sum is σ = 21996285744030. Its totient is φ = 21996285744028.

The previous prime is 21996285744007. The next prime is 21996285744149. The reversal of 21996285744029 is 92044758269912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12787761696004 + 9208524048025 = 3575998^2 + 3034555^2 .

It is a cyclic number.

It is not a de Polignac number, because 21996285744029 - 2³⁶ = 21927566267293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21996285744029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21996285749029) 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, 10998142872014 + 10998142872015.

It is an arithmetic number, because the mean of its divisors is an integer number (10998142872015).

Almost surely, 2^{21996285744029} is an apocalyptic number.

It is an amenable number.

21996285744029 is a deficient number, since it is larger than the sum of its proper divisors (1).

21996285744029 is an equidigital number, since it uses as much as digits as its factorization.

21996285744029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 156764160, while the sum is 68.

The spelling of 21996285744029 in words is "twenty-one trillion, nine hundred ninety-six billion, two hundred eighty-five million, seven hundred forty-four thousand, twenty-nine".