20520104405113 has 4 divisors (see below), whose sum is σ = 20520761479168. Its totient is φ = 20519447331060.

The previous prime is 20520104405107. The next prime is 20520104405147. The reversal of 20520104405113 is 31150440102502.

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 20520104405113 - 2²¹ = 20520102307961 is a prime.

It is a super-3 number, since 3×20520104405113³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20520104405413) 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, 328490181 + ... + 328552642.

It is an arithmetic number, because the mean of its divisors is an integer number (5130190369792).

Almost surely, 2^{20520104405113} is an apocalyptic number.

It is an amenable number.

20520104405113 is a deficient number, since it is larger than the sum of its proper divisors (657074055).

20520104405113 is an equidigital number, since it uses as much as digits as its factorization.

20520104405113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657074054.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 20520104405113 its reverse (31150440102502), we get a palindrome (51670544507615).

The spelling of 20520104405113 in words is "twenty trillion, five hundred twenty billion, one hundred four million, four hundred five thousand, one hundred thirteen".