20001143323144 has 16 divisors (see below), whose sum is σ = 37502254611900. Its totient is φ = 10000542093312.

The previous prime is 20001143323141. The next prime is 20001143323157. The reversal of 20001143323144 is 44132334110002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16535104730244 + 3466038592900 = 4066338^2 + 1861730^2 .

It is not an unprimeable number, because it can be changed into a prime (20001143323141) 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, 676009 + ... + 6360760.

Almost surely, 2^{20001143323144} is an apocalyptic number.

It is an amenable number.

20001143323144 is a deficient number, since it is larger than the sum of its proper divisors (17501111288756).

20001143323144 is a wasteful number, since it uses less digits than its factorization.

20001143323144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7392072 (or 7392068 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 20001143323144 its reverse (44132334110002), we get a palindrome (64133477433146).

The spelling of 20001143323144 in words is "twenty trillion, one billion, one hundred forty-three million, three hundred twenty-three thousand, one hundred forty-four".