20445144005 has 16 divisors (see below), whose sum is σ = 28823364864. Its totient is φ = 13725410880.

The previous prime is 20445143951. The next prime is 20445144017. The reversal of 20445144005 is 50044154402.

It is not a de Polignac number, because 20445144005 - 2¹⁶ = 20445078469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14296589 + ... + 14298018.

It is an arithmetic number, because the mean of its divisors is an integer number (1801460304).

Almost surely, 2^20445144005 is an apocalyptic number.

It is an amenable number.

20445144005 is a deficient number, since it is larger than the sum of its proper divisors (8378220859).

20445144005 is a wasteful number, since it uses less digits than its factorization.

20445144005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28594636.

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 20445144005 its reverse (50044154402), we get a palindrome (70489298407).

The spelling of 20445144005 in words is "twenty billion, four hundred forty-five million, one hundred forty-four thousand, five".