20440024220479 has 2 divisors, whose sum is σ = 20440024220480. Its totient is φ = 20440024220478.

The previous prime is 20440024220393. The next prime is 20440024220491. The reversal of 20440024220479 is 97402242004402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20440024220479 - 2²⁵ = 20439990666047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20440024260479) 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, 10220012110239 + 10220012110240.

It is an arithmetic number, because the mean of its divisors is an integer number (10220012110240).

Almost surely, 2^{20440024220479} is an apocalyptic number.

20440024220479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20440024220479 is an equidigital number, since it uses as much as digits as its factorization.

20440024220479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 40.

The spelling of 20440024220479 in words is "twenty trillion, four hundred forty billion, twenty-four million, two hundred twenty thousand, four hundred seventy-nine".