20445224443 has 4 divisors (see below), whose sum is σ = 23365970800. Its totient is φ = 17524478088.

The previous prime is 20445224407. The next prime is 20445224453. The reversal of 20445224443 is 34442254402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34442254402 = 2 ⋅17221127201.

It is a cyclic number.

It is not a de Polignac number, because 20445224443 - 2²⁵ = 20411670011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20445224399 and 20445224408.

It is not an unprimeable number, because it can be changed into a prime (20445224453) 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 in 3 ways as a sum of consecutive naturals, for example, 1460373168 + ... + 1460373181.

It is an arithmetic number, because the mean of its divisors is an integer number (5841492700).

Almost surely, 2^20445224443 is an apocalyptic number.

20445224443 is a deficient number, since it is larger than the sum of its proper divisors (2920746357).

20445224443 is an equidigital number, since it uses as much as digits as its factorization.

20445224443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920746356.

The product of its (nonzero) digits is 122880, while the sum is 34.

Adding to 20445224443 its reverse (34442254402), we get a palindrome (54887478845).

The spelling of 20445224443 in words is "twenty billion, four hundred forty-five million, two hundred twenty-four thousand, four hundred forty-three".