20431002143 has 8 divisors (see below), whose sum is σ = 21320755200. Its totient is φ = 19541369848.

The previous prime is 20431002133. The next prime is 20431002149. The reversal of 20431002143 is 34120013402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20431002143 - 2⁴ = 20431002127 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 (20431002149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567638 + ... + 602556.

It is an arithmetic number, because the mean of its divisors is an integer number (2665094400).

Almost surely, 2^20431002143 is an apocalyptic number.

20431002143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20431002143 is a deficient number, since it is larger than the sum of its proper divisors (889753057).

20431002143 is a wasteful number, since it uses less digits than its factorization.

20431002143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60381.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20431002143 its reverse (34120013402), we get a palindrome (54551015545).

The spelling of 20431002143 in words is "twenty billion, four hundred thirty-one million, two thousand, one hundred forty-three".