20443423220344 has 32 divisors (see below), whose sum is σ = 40616072668800. Its totient is φ = 9619596136800.

The previous prime is 20443423220329. The next prime is 20443423220371. The reversal of 20443423220344 is 44302232434402.

It is a super-2 number, since 2×20443423220344² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445328722 + ... + 445374625.

It is an arithmetic number, because the mean of its divisors is an integer number (1269252270900).

Almost surely, 2^{20443423220344} is an apocalyptic number.

It is an amenable number.

20443423220344 is a deficient number, since it is larger than the sum of its proper divisors (20172649448456).

20443423220344 is a wasteful number, since it uses less digits than its factorization.

20443423220344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890703523 (or 890703519 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 37.

Adding to 20443423220344 its reverse (44302232434402), we get a palindrome (64745655654746).

The spelling of 20443423220344 in words is "twenty trillion, four hundred forty-three billion, four hundred twenty-three million, two hundred twenty thousand, three hundred forty-four".