20123203312144 has 40 divisors (see below), whose sum is σ = 39385289769408. Its totient is φ = 9959644506240.

The previous prime is 20123203312141. The next prime is 20123203312189. The reversal of 20123203312144 is 44121330232102.

It is not an unprimeable number, because it can be changed into a prime (20123203312141) 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 7 ways as a sum of consecutive naturals, for example, 11259532 + ... + 12923755.

Almost surely, 2^{20123203312144} is an apocalyptic number.

It is an amenable number.

20123203312144 is a deficient number, since it is larger than the sum of its proper divisors (19262086457264).

20123203312144 is a wasteful number, since it uses less digits than its factorization.

20123203312144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24183823 (or 24183817 counting only the distinct ones).

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

Adding to 20123203312144 its reverse (44121330232102), we get a palindrome (64244533544246).

The spelling of 20123203312144 in words is "twenty trillion, one hundred twenty-three billion, two hundred three million, three hundred twelve thousand, one hundred forty-four".