20523124105 has 16 divisors (see below), whose sum is σ = 27438269184. Its totient is φ = 14608334080.

The previous prime is 20523124087. The next prime is 20523124109. The reversal of 20523124105 is 50142132502.

It is not a de Polignac number, because 20523124105 - 2⁷ = 20523123977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20523124105.

It is not an unprimeable number, because it can be changed into a prime (20523124109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3967072 + ... + 3972241.

It is an arithmetic number, because the mean of its divisors is an integer number (1714891824).

Almost surely, 2^20523124105 is an apocalyptic number.

It is an amenable number.

20523124105 is a deficient number, since it is larger than the sum of its proper divisors (6915145079).

20523124105 is a wasteful number, since it uses less digits than its factorization.

20523124105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7939376.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 20523124105 its reverse (50142132502), we get a palindrome (70665256607).

The spelling of 20523124105 in words is "twenty billion, five hundred twenty-three million, one hundred twenty-four thousand, one hundred five".