20413515116413 has 4 divisors (see below), whose sum is σ = 20505055543168. Its totient is φ = 20321974689660.

The previous prime is 20413515116311. The next prime is 20413515116507. The reversal of 20413515116413 is 31461151531402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20413515116413 - 2¹³ = 20413515108221 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 (20413515116213) 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, 45770213043 + ... + 45770213488.

It is an arithmetic number, because the mean of its divisors is an integer number (5126263885792).

Almost surely, 2^{20413515116413} is an apocalyptic number.

It is an amenable number.

20413515116413 is a deficient number, since it is larger than the sum of its proper divisors (91540426755).

20413515116413 is an equidigital number, since it uses as much as digits as its factorization.

20413515116413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91540426754.

The product of its (nonzero) digits is 43200, while the sum is 37.

Adding to 20413515116413 its reverse (31461151531402), we get a palindrome (51874666647815).

The spelling of 20413515116413 in words is "twenty trillion, four hundred thirteen billion, five hundred fifteen million, one hundred sixteen thousand, four hundred thirteen".