20431004043 has 4 divisors (see below), whose sum is σ = 27241338728. Its totient is φ = 13620669360.

The previous prime is 20431004003. The next prime is 20431004071. The reversal of 20431004043 is 34040013402.

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

It is not a de Polignac number, because 20431004043 - 2⁸ = 20431003787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20431004003) 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, 3405167338 + ... + 3405167343.

It is an arithmetic number, because the mean of its divisors is an integer number (6810334682).

Almost surely, 2^20431004043 is an apocalyptic number.

20431004043 is a deficient number, since it is larger than the sum of its proper divisors (6810334685).

20431004043 is an equidigital number, since it uses as much as digits as its factorization.

20431004043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6810334684.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20431004043 its reverse (34040013402), we get a palindrome (54471017445).

The spelling of 20431004043 in words is "twenty billion, four hundred thirty-one million, four thousand, forty-three".