20011202102005 has 16 divisors (see below), whose sum is σ = 24019833597120. Its totient is φ = 16004701562752.

The previous prime is 20011202101949. The next prime is 20011202102033. The reversal of 20011202102005 is 50020120211002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20011202102005 - 2¹¹ = 20011202099957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20011202102005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348920742 + ... + 348978088.

It is an arithmetic number, because the mean of its divisors is an integer number (1501239599820).

Almost surely, 2^{20011202102005} is an apocalyptic number.

It is an amenable number.

20011202102005 is a deficient number, since it is larger than the sum of its proper divisors (4008631495115).

20011202102005 is a wasteful number, since it uses less digits than its factorization.

20011202102005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74708.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 20011202102005 its reverse (50020120211002), we get a palindrome (70031322313007).

The spelling of 20011202102005 in words is "twenty trillion, eleven billion, two hundred two million, one hundred two thousand, five".