20313021143 has 2 divisors, whose sum is σ = 20313021144. Its totient is φ = 20313021142.

The previous prime is 20313021109. The next prime is 20313021191. The reversal of 20313021143 is 34112031302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20313021143 - 2²⁰ = 20311972567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20313021943) 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 as a sum of consecutive naturals, namely, 10156510571 + 10156510572.

It is an arithmetic number, because the mean of its divisors is an integer number (10156510572).

Almost surely, 2^20313021143 is an apocalyptic number.

20313021143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313021143 is an equidigital number, since it uses as much as digits as its factorization.

20313021143 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20313021143 its reverse (34112031302), we get a palindrome (54425052445).

The spelling of 20313021143 in words is "twenty billion, three hundred thirteen million, twenty-one thousand, one hundred forty-three".