20431043135 has 8 divisors (see below), whose sum is σ = 25179880416. Its totient is φ = 15903082080.

The previous prime is 20431043131. The next prime is 20431043137. The reversal of 20431043135 is 53134013402.

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

It is not a de Polignac number, because 20431043135 - 2² = 20431043131 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 (20431043131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55218851 + ... + 55219220.

It is an arithmetic number, because the mean of its divisors is an integer number (3147485052).

Almost surely, 2^20431043135 is an apocalyptic number.

20431043135 is a deficient number, since it is larger than the sum of its proper divisors (4748837281).

20431043135 is a wasteful number, since it uses less digits than its factorization.

20431043135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110438113.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 20431043135 its reverse (53134013402), we get a palindrome (73565056537).

The spelling of 20431043135 in words is "twenty billion, four hundred thirty-one million, forty-three thousand, one hundred thirty-five".