21441882479 has 2 divisors, whose sum is σ = 21441882480. Its totient is φ = 21441882478.

The previous prime is 21441882443. The next prime is 21441882557. The reversal of 21441882479 is 97428814412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21441882479 - 2¹⁶ = 21441816943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21441882419) 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, 10720941239 + 10720941240.

It is an arithmetic number, because the mean of its divisors is an integer number (10720941240).

Almost surely, 2^21441882479 is an apocalyptic number.

21441882479 is a deficient number, since it is larger than the sum of its proper divisors (1).

21441882479 is an equidigital number, since it uses as much as digits as its factorization.

21441882479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1032192, while the sum is 50.

The spelling of 21441882479 in words is "twenty-one billion, four hundred forty-one million, eight hundred eighty-two thousand, four hundred seventy-nine".