20431021143 has 16 divisors (see below), whose sum is σ = 29440530560. Its totient is φ = 12528501984.

The previous prime is 20431021129. The next prime is 20431021181. The reversal of 20431021143 is 34112013402.

It is not a de Polignac number, because 20431021143 - 2⁵ = 20431021111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431021183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 914533 + ... + 936606.

It is an arithmetic number, because the mean of its divisors is an integer number (1840033160).

Almost surely, 2^20431021143 is an apocalyptic number.

20431021143 is a deficient number, since it is larger than the sum of its proper divisors (9009509417).

20431021143 is a wasteful number, since it uses less digits than its factorization.

20431021143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851438.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20431021143 its reverse (34112013402), we get a palindrome (54543034545).

The spelling of 20431021143 in words is "twenty billion, four hundred thirty-one million, twenty-one thousand, one hundred forty-three".