20413515116311 has 2 divisors, whose sum is σ = 20413515116312. Its totient is φ = 20413515116310.

The previous prime is 20413515116261. The next prime is 20413515116507. The reversal of 20413515116311 is 11361151531402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20413515116311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20413515416311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206757558155 + 10206757558156.

It is an arithmetic number, because the mean of its divisors is an integer number (10206757558156).

Almost surely, 2^{20413515116311} is an apocalyptic number.

20413515116311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20413515116311 is an equidigital number, since it uses as much as digits as its factorization.

20413515116311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 34.

Adding to 20413515116311 its reverse (11361151531402), we get a palindrome (31774666647713).

The spelling of 20413515116311 in words is "twenty trillion, four hundred thirteen billion, five hundred fifteen million, one hundred sixteen thousand, three hundred eleven".