20005344013 has 16 divisors (see below), whose sum is σ = 20605978800. Its totient is φ = 19413388800.

The previous prime is 20005343989. The next prime is 20005344053. The reversal of 20005344013 is 31044350002.

It can be written as a sum of positive squares in 8 ways, for example, as 12244086409 + 7761257604 = 110653^2 + 88098^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20005344013 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 (20005344053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9575473 + ... + 9577561.

It is an arithmetic number, because the mean of its divisors is an integer number (1287873675).

Almost surely, 2^20005344013 is an apocalyptic number.

It is an amenable number.

20005344013 is a deficient number, since it is larger than the sum of its proper divisors (600634787).

20005344013 is a wasteful number, since it uses less digits than its factorization.

20005344013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4032.

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 20005344013 its reverse (31044350002), we get a palindrome (51049694015).

The spelling of 20005344013 in words is "twenty billion, five million, three hundred forty-four thousand, thirteen".