20112205505 has 16 divisors (see below), whose sum is σ = 27767577600. Its totient is φ = 13698664512.

The previous prime is 20112205499. The next prime is 20112205511. The reversal of 20112205505 is 50550221102.

It is an interprime number because it is at equal distance from previous prime (20112205499) and next prime (20112205511).

It is a cyclic number.

It is not a de Polignac number, because 20112205505 - 2¹² = 20112201409 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1923089 + ... + 1933518.

It is an arithmetic number, because the mean of its divisors is an integer number (1735473600).

Almost surely, 2^20112205505 is an apocalyptic number.

It is an amenable number.

20112205505 is a deficient number, since it is larger than the sum of its proper divisors (7655372095).

20112205505 is a wasteful number, since it uses less digits than its factorization.

20112205505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856768.

The product of its (nonzero) digits is 1000, while the sum is 23.

Adding to 20112205505 its reverse (50550221102), we get a palindrome (70662426607).

The spelling of 20112205505 in words is "twenty billion, one hundred twelve million, two hundred five thousand, five hundred five".