20411023440013 has 4 divisors (see below), whose sum is σ = 20480685636348. Its totient is φ = 20341361243680.

The previous prime is 20411023439971. The next prime is 20411023440019. The reversal of 20411023440013 is 31004432011402.

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 16240593721444 + 4170429718569 = 4029962^2 + 2042163^2 .

It is a cyclic number.

It is not a de Polignac number, because 20411023440013 - 2⁹ = 20411023439501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20411023440013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20411023440019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34831097728 + ... + 34831098313.

It is an arithmetic number, because the mean of its divisors is an integer number (5120171409087).

Almost surely, 2^{20411023440013} is an apocalyptic number.

It is an amenable number.

20411023440013 is a deficient number, since it is larger than the sum of its proper divisors (69662196335).

20411023440013 is an equidigital number, since it uses as much as digits as its factorization.

20411023440013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69662196334.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 20411023440013 its reverse (31004432011402), we get a palindrome (51415455451415).

The spelling of 20411023440013 in words is "twenty trillion, four hundred eleven billion, twenty-three million, four hundred forty thousand, thirteen".