20520232311105 has 32 divisors (see below), whose sum is σ = 36510096297600. Its totient is φ = 10935218909376.

The previous prime is 20520232310989. The next prime is 20520232311133. The reversal of 20520232311105 is 50111323202502.

20520232311105 is a `hidden beast` number, since 2 + 0 + 520 + 2 + 3 + 2 + 31 + 1 + 105 = 666.

It is not a de Polignac number, because 20520232311105 - 2¹⁴ = 20520232294721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61673679 + ... + 62005508.

It is an arithmetic number, because the mean of its divisors is an integer number (1140940509300).

Almost surely, 2^{20520232311105} is an apocalyptic number.

It is an amenable number.

20520232311105 is a deficient number, since it is larger than the sum of its proper divisors (15989863986495).

20520232311105 is a wasteful number, since it uses less digits than its factorization.

20520232311105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123680430 (or 123680424 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 20520232311105 its reverse (50111323202502), we get a palindrome (70631555513607).

The spelling of 20520232311105 in words is "twenty trillion, five hundred twenty billion, two hundred thirty-two million, three hundred eleven thousand, one hundred five".