20431442143 has 12 divisors (see below), whose sum is σ = 24409546392. Its totient is φ = 17039347920.

The previous prime is 20431442113. The next prime is 20431442147. The reversal of 20431442143 is 34124413402.

It is not a de Polignac number, because 20431442143 - 2⁹ = 20431441631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431442147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5632893 + ... + 5636518.

It is an arithmetic number, because the mean of its divisors is an integer number (2034128866).

Almost surely, 2^20431442143 is an apocalyptic number.

20431442143 is a deficient number, since it is larger than the sum of its proper divisors (3978104249).

20431442143 is a wasteful number, since it uses less digits than its factorization.

20431442143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11269462 (or 11269455 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20431442143 its reverse (34124413402), we get a palindrome (54555855545).

The spelling of 20431442143 in words is "twenty billion, four hundred thirty-one million, four hundred forty-two thousand, one hundred forty-three".