20123243144 has 16 divisors (see below), whose sum is σ = 39032153100. Its totient is φ = 9714668992.

The previous prime is 20123243143. The next prime is 20123243167. The reversal of 20123243144 is 44134232102.

It can be written as a sum of positive squares in 2 ways, for example, as 18731207044 + 1392036100 = 136862^2 + 37310^2 .

It is not an unprimeable number, because it can be changed into a prime (20123243143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43368827 + ... + 43369290.

Almost surely, 2^20123243144 is an apocalyptic number.

It is an amenable number.

20123243144 is a deficient number, since it is larger than the sum of its proper divisors (18908909956).

20123243144 is a wasteful number, since it uses less digits than its factorization.

20123243144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86738152 (or 86738148 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 20123243144 its reverse (44134232102), we get a palindrome (64257475246).

The spelling of 20123243144 in words is "twenty billion, one hundred twenty-three million, two hundred forty-three thousand, one hundred forty-four".