20123311143 has 24 divisors (see below), whose sum is σ = 29081935440. Its totient is φ = 12371573760.

The previous prime is 20123311093. The next prime is 20123311151. The reversal of 20123311143 is 34111332102.

It is not a de Polignac number, because 20123311143 - 2⁸ = 20123310887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123311193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 519223 + ... + 556631.

It is an arithmetic number, because the mean of its divisors is an integer number (1211747310).

Almost surely, 2^20123311143 is an apocalyptic number.

20123311143 is a deficient number, since it is larger than the sum of its proper divisors (8958624297).

20123311143 is a wasteful number, since it uses less digits than its factorization.

20123311143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38499 (or 38486 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 20123311143 its reverse (34111332102), we get a palindrome (54234643245).

The spelling of 20123311143 in words is "twenty billion, one hundred twenty-three million, three hundred eleven thousand, one hundred forty-three".