20131434305 has 4 divisors (see below), whose sum is σ = 24157721172. Its totient is φ = 16105147440.

The previous prime is 20131434277. The next prime is 20131434341. The reversal of 20131434305 is 50343413102.

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 8362005136 + 11769429169 = 91444^2 + 108487^2 .

It is not a de Polignac number, because 20131434305 - 2³⁰ = 19057692481 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2013143426 + ... + 2013143435.

It is an arithmetic number, because the mean of its divisors is an integer number (6039430293).

Almost surely, 2^20131434305 is an apocalyptic number.

It is an amenable number.

20131434305 is a deficient number, since it is larger than the sum of its proper divisors (4026286867).

20131434305 is an equidigital number, since it uses as much as digits as its factorization.

20131434305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4026286866.

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

Adding to 20131434305 its reverse (50343413102), we get a palindrome (70474847407).

The spelling of 20131434305 in words is "twenty billion, one hundred thirty-one million, four hundred thirty-four thousand, three hundred five".