20440523105 has 16 divisors (see below), whose sum is σ = 24755040720. Its totient is φ = 16201586688.

The previous prime is 20440523099. The next prime is 20440523113. The reversal of 20440523105 is 50132504402.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 6887838049 + 13552685056 = 82993^2 + 116416^2 .

It is a cyclic number.

It is not a de Polignac number, because 20440523105 - 2¹⁴ = 20440506721 is a prime.

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, 2025011 + ... + 2035079.

It is an arithmetic number, because the mean of its divisors is an integer number (1547190045).

Almost surely, 2^20440523105 is an apocalyptic number.

It is an amenable number.

20440523105 is a deficient number, since it is larger than the sum of its proper divisors (4314517615).

20440523105 is a wasteful number, since it uses less digits than its factorization.

20440523105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13780.

The product of its (nonzero) digits is 4800, while the sum is 26.

The spelling of 20440523105 in words is "twenty billion, four hundred forty million, five hundred twenty-three thousand, one hundred five".