20340431029 has 4 divisors (see below), whose sum is σ = 20673880780. Its totient is φ = 20006981280.

The previous prime is 20340431003. The next prime is 20340431077. The reversal of 20340431029 is 92013404302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 395930404 + 19944500625 = 19898^2 + 141225^2 .

It is a cyclic number.

It is not a de Polignac number, because 20340431029 - 2¹⁵ = 20340398261 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20340430988 and 20340431006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340431129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166724784 + ... + 166724905.

It is an arithmetic number, because the mean of its divisors is an integer number (5168470195).

Almost surely, 2^20340431029 is an apocalyptic number.

It is an amenable number.

20340431029 is a deficient number, since it is larger than the sum of its proper divisors (333449751).

20340431029 is an equidigital number, since it uses as much as digits as its factorization.

20340431029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333449750.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 20340431029 in words is "twenty billion, three hundred forty million, four hundred thirty-one thousand, twenty-nine".