20523514105 has 4 divisors (see below), whose sum is σ = 24628216932. Its totient is φ = 16418811280.

The previous prime is 20523514103. The next prime is 20523514139. The reversal of 20523514105 is 50141532502.

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 3827773161 + 16695740944 = 61869^2 + 129212^2 .

It is not a de Polignac number, because 20523514105 - 2¹ = 20523514103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20523514103) 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, 2052351406 + ... + 2052351415.

It is an arithmetic number, because the mean of its divisors is an integer number (6157054233).

Almost surely, 2^20523514105 is an apocalyptic number.

It is an amenable number.

20523514105 is a deficient number, since it is larger than the sum of its proper divisors (4104702827).

20523514105 is an equidigital number, since it uses as much as digits as its factorization.

20523514105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104702826.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 20523514105 in words is "twenty billion, five hundred twenty-three million, five hundred fourteen thousand, one hundred five".