20420411115413 has 4 divisors (see below), whose sum is σ = 20918469923148. Its totient is φ = 19922352307680.

The previous prime is 20420411115341. The next prime is 20420411115449. The reversal of 20420411115413 is 31451111402402.

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 4421507096644 + 15998904018769 = 2102738^2 + 3999863^2 .

It is a cyclic number.

It is not a de Polignac number, because 20420411115413 - 2¹⁶ = 20420411049877 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 (20420411115473) 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, 249029403806 + ... + 249029403887.

It is an arithmetic number, because the mean of its divisors is an integer number (5229617480787).

Almost surely, 2^{20420411115413} is an apocalyptic number.

It is an amenable number.

20420411115413 is a deficient number, since it is larger than the sum of its proper divisors (498058807735).

20420411115413 is an equidigital number, since it uses as much as digits as its factorization.

20420411115413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498058807734.

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 20420411115413 its reverse (31451111402402), we get a palindrome (51871522517815).

The spelling of 20420411115413 in words is "twenty trillion, four hundred twenty billion, four hundred eleven million, one hundred fifteen thousand, four hundred thirteen".