20001131404044 has 48 divisors (see below), whose sum is σ = 53342666539008. Its totient is φ = 5713932244608.

The previous prime is 20001131404027. The next prime is 20001131404049. The reversal of 20001131404044 is 44040413110002.

It is a super-2 number, since 2×20001131404044² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20001131404049) 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, 13384729 + ... + 14803824.

It is an arithmetic number, because the mean of its divisors is an integer number (1111305552896).

Almost surely, 2^{20001131404044} is an apocalyptic number.

It is an amenable number.

20001131404044 is an abundant number, since it is smaller than the sum of its proper divisors (33341535134964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001131404044 is a wasteful number, since it uses less digits than its factorization.

20001131404044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28197014 (or 28197012 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 20001131404044 its reverse (44040413110002), we get a palindrome (64041544514046).

The spelling of 20001131404044 in words is "twenty trillion, one billion, one hundred thirty-one million, four hundred four thousand, forty-four".