20523313105 has 16 divisors (see below), whose sum is σ = 24708340800. Its totient is φ = 16365165120.

The previous prime is 20523313099. The next prime is 20523313141. The reversal of 20523313105 is 50131332502.

It is not a de Polignac number, because 20523313105 - 2⁵ = 20523313073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20523313105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2019126 + ... + 2029264.

It is an arithmetic number, because the mean of its divisors is an integer number (1544271300).

Almost surely, 2^20523313105 is an apocalyptic number.

It is an amenable number.

20523313105 is a deficient number, since it is larger than the sum of its proper divisors (4185027695).

20523313105 is a wasteful number, since it uses less digits than its factorization.

20523313105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11424.

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 20523313105 its reverse (50131332502), we get a palindrome (70654645607).

The spelling of 20523313105 in words is "twenty billion, five hundred twenty-three million, three hundred thirteen thousand, one hundred five".