20031123143 has 2 divisors, whose sum is σ = 20031123144. Its totient is φ = 20031123142.

The previous prime is 20031123127. The next prime is 20031123169. The reversal of 20031123143 is 34132113002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20031123143 - 2⁴ = 20031123127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20031123113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015561571 + 10015561572.

It is an arithmetic number, because the mean of its divisors is an integer number (10015561572).

Almost surely, 2^20031123143 is an apocalyptic number.

20031123143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20031123143 is an equidigital number, since it uses as much as digits as its factorization.

20031123143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20031123143 its reverse (34132113002), we get a palindrome (54163236145).

The spelling of 20031123143 in words is "twenty billion, thirty-one million, one hundred twenty-three thousand, one hundred forty-three".