20740444552013 has 2 divisors, whose sum is σ = 20740444552014. Its totient is φ = 20740444552012.

The previous prime is 20740444551923. The next prime is 20740444552021. The reversal of 20740444552013 is 31025544404702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19215273891529 + 1525170660484 = 4383523^2 + 1234978^2 .

It is a cyclic number.

It is not a de Polignac number, because 20740444552013 - 2¹⁸ = 20740444289869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20740444552073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10370222276006 + 10370222276007.

It is an arithmetic number, because the mean of its divisors is an integer number (10370222276007).

Almost surely, 2^{20740444552013} is an apocalyptic number.

It is an amenable number.

20740444552013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20740444552013 is an equidigital number, since it uses as much as digits as its factorization.

20740444552013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 537600, while the sum is 41.

Adding to 20740444552013 its reverse (31025544404702), we get a palindrome (51765988956715).

The spelling of 20740444552013 in words is "twenty trillion, seven hundred forty billion, four hundred forty-four million, five hundred fifty-two thousand, thirteen".