20110000011205 has 16 divisors (see below), whose sum is σ = 25988508065520. Its totient is φ = 14850347056128.

The previous prime is 20110000011181. The next prime is 20110000011239. The reversal of 20110000011205 is 50211000001102.

It can be written as a sum of positive squares in 8 ways, for example, as 7492460481 + 20102507550724 = 86559^2 + 4483582^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110000011205 - 2⁹ = 20110000010693 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

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, 7823661 + ... + 10071229.

It is an arithmetic number, because the mean of its divisors is an integer number (1624281754095).

Almost surely, 2^{20110000011205} is an apocalyptic number.

It is an amenable number.

20110000011205 is a deficient number, since it is larger than the sum of its proper divisors (5878508054315).

20110000011205 is a wasteful number, since it uses less digits than its factorization.

20110000011205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385240.

The product of its (nonzero) digits is 20, while the sum is 13.

Adding to 20110000011205 its reverse (50211000001102), we get a palindrome (70321000012307).

The spelling of 20110000011205 in words is "twenty trillion, one hundred ten billion, eleven thousand, two hundred five".