20334340913 has 2 divisors, whose sum is σ = 20334340914. Its totient is φ = 20334340912.

The previous prime is 20334340909. The next prime is 20334340927. The reversal of 20334340913 is 31904343302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17293039009 + 3041301904 = 131503^2 + 55148^2 .

It is a cyclic number.

It is not a de Polignac number, because 20334340913 - 2² = 20334340909 is a prime.

It is a super-2 number, since 2×20334340913² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20334340913.

It is not a weakly prime, because it can be changed into another prime (20334340513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10167170456 + 10167170457.

It is an arithmetic number, because the mean of its divisors is an integer number (10167170457).

Almost surely, 2^20334340913 is an apocalyptic number.

It is an amenable number.

20334340913 is a deficient number, since it is larger than the sum of its proper divisors (1).

20334340913 is an equidigital number, since it uses as much as digits as its factorization.

20334340913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 32.

The spelling of 20334340913 in words is "twenty billion, three hundred thirty-four million, three hundred forty thousand, nine hundred thirteen".