20013113444 has 12 divisors (see below), whose sum is σ = 35083650924. Its totient is φ = 9989213184.

The previous prime is 20013113443. The next prime is 20013113521. The reversal of 20013113444 is 44431131002.

It can be written as a sum of positive squares in 2 ways, for example, as 18341284900 + 1671828544 = 135430^2 + 40888^2 .

It is a super-2 number, since 2×20013113444² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20013113443) 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 3 ways as a sum of consecutive naturals, for example, 4333289 + ... + 4337904.

It is an arithmetic number, because the mean of its divisors is an integer number (2923637577).

Almost surely, 2^20013113444 is an apocalyptic number.

It is an amenable number.

20013113444 is a deficient number, since it is larger than the sum of its proper divisors (15070537480).

20013113444 is a wasteful number, since it uses less digits than its factorization.

20013113444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8671774 (or 8671772 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20013113444 its reverse (44431131002), we get a palindrome (64444244446).

The spelling of 20013113444 in words is "twenty billion, thirteen million, one hundred thirteen thousand, four hundred forty-four".