20434404313 has 2 divisors, whose sum is σ = 20434404314. Its totient is φ = 20434404312.

The previous prime is 20434404307. The next prime is 20434404337. The reversal of 20434404313 is 31340443402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20433844809 + 559504 = 142947^2 + 748^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20434404313 is a prime.

It is not a weakly prime, because it can be changed into another prime (20434404113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10217202156 + 10217202157.

It is an arithmetic number, because the mean of its divisors is an integer number (10217202157).

Almost surely, 2^20434404313 is an apocalyptic number.

It is an amenable number.

20434404313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20434404313 is an equidigital number, since it uses as much as digits as its factorization.

20434404313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 20434404313 its reverse (31340443402), we get a palindrome (51774847715).

The spelling of 20434404313 in words is "twenty billion, four hundred thirty-four million, four hundred four thousand, three hundred thirteen".