20431104143 has 4 divisors (see below), whose sum is σ = 20816596728. Its totient is φ = 20045611560.

The previous prime is 20431104077. The next prime is 20431104163. The reversal of 20431104143 is 34140113402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34140113402 = 2 ⋅17070056701.

It is a cyclic number.

It is not a de Polignac number, because 20431104143 - 2¹² = 20431100047 is a prime.

It is a super-2 number, since 2×20431104143² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431104163) 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 3 ways as a sum of consecutive naturals, for example, 192746213 + ... + 192746318.

It is an arithmetic number, because the mean of its divisors is an integer number (5204149182).

Almost surely, 2^20431104143 is an apocalyptic number.

20431104143 is a deficient number, since it is larger than the sum of its proper divisors (385492585).

20431104143 is an equidigital number, since it uses as much as digits as its factorization.

20431104143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385492584.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 20431104143 its reverse (34140113402), we get a palindrome (54571217545).

The spelling of 20431104143 in words is "twenty billion, four hundred thirty-one million, one hundred four thousand, one hundred forty-three".