20440202042 has 32 divisors (see below), whose sum is σ = 34972115472. Its totient is φ = 8876196864.

The previous prime is 20440202039. The next prime is 20440202047. The reversal of 20440202042 is 24020204402.

It can be written as a sum of positive squares in 8 ways, for example, as 2997453001 + 17442749041 = 54749^2 + 132071^2 .

It is not an unprimeable number, because it can be changed into a prime (20440202047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2044568 + ... + 2054540.

Almost surely, 2^20440202042 is an apocalyptic number.

20440202042 is a deficient number, since it is larger than the sum of its proper divisors (14531913430).

20440202042 is a wasteful number, since it uses less digits than its factorization.

20440202042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14642.

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 20440202042 its reverse (24020204402), we get a palindrome (44460406444).

The spelling of 20440202042 in words is "twenty billion, four hundred forty million, two hundred two thousand, forty-two".