20431401143 has 4 divisors (see below), whose sum is σ = 20435539488. Its totient is φ = 20427262800.

The previous prime is 20431401127. The next prime is 20431401169. The reversal of 20431401143 is 34110413402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20431401143 - 2⁴ = 20431401127 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 (20431401173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2061758 + ... + 2071643.

It is an arithmetic number, because the mean of its divisors is an integer number (5108884872).

Almost surely, 2^20431401143 is an apocalyptic number.

20431401143 is a deficient number, since it is larger than the sum of its proper divisors (4138345).

20431401143 is an equidigital number, since it uses as much as digits as its factorization.

20431401143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4138344.

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

Adding to 20431401143 its reverse (34110413402), we get a palindrome (54541814545).

The spelling of 20431401143 in words is "twenty billion, four hundred thirty-one million, four hundred one thousand, one hundred forty-three".