20404245204013 has 16 divisors (see below), whose sum is σ = 22559422689792. Its totient is φ = 18453203155200.

The previous prime is 20404245203981. The next prime is 20404245204041. The reversal of 20404245204013 is 31040254240402.

It is not a de Polignac number, because 20404245204013 - 2⁵ = 20404245203981 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 (20404245204073) 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 in 15 ways as a sum of consecutive naturals, for example, 39458173 + ... + 39971938.

It is an arithmetic number, because the mean of its divisors is an integer number (1409963918112).

Almost surely, 2^{20404245204013} is an apocalyptic number.

It is an amenable number.

20404245204013 is a deficient number, since it is larger than the sum of its proper divisors (2155177485779).

20404245204013 is an equidigital number, since it uses as much as digits as its factorization.

20404245204013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79430337 (or 79430315 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 20404245204013 its reverse (31040254240402), we get a palindrome (51444499444415).

The spelling of 20404245204013 in words is "twenty trillion, four hundred four billion, two hundred forty-five million, two hundred four thousand, thirteen".