20440204133 has 16 divisors (see below), whose sum is σ = 21740932656. Its totient is φ = 19150602240.

The previous prime is 20440204117. The next prime is 20440204153. The reversal of 20440204133 is 33140204402.

It can be written as a sum of positive squares in 8 ways, for example, as 2075075809 + 18365128324 = 45553^2 + 135518^2 .

It is a cyclic number.

It is not a de Polignac number, because 20440204133 - 2⁴ = 20440204117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20440204099 and 20440204108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440204153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3964085 + ... + 3969237.

It is an arithmetic number, because the mean of its divisors is an integer number (1358808291).

Almost surely, 2^20440204133 is an apocalyptic number.

It is an amenable number.

20440204133 is a deficient number, since it is larger than the sum of its proper divisors (1300728523).

20440204133 is a wasteful number, since it uses less digits than its factorization.

20440204133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6184.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20440204133 its reverse (33140204402), we get a palindrome (53580408535).

The spelling of 20440204133 in words is "twenty billion, four hundred forty million, two hundred four thousand, one hundred thirty-three".