20111101860845 has 4 divisors (see below), whose sum is σ = 24133322233020. Its totient is φ = 16088881488672.

The previous prime is 20111101860763. The next prime is 20111101860881. The reversal of 20111101860845 is 54806810111102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10260304455241 + 9850797405604 = 3203171^2 + 3138598^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111101860845 - 2¹² = 20111101856749 is a prime.

It is a super-2 number, since 2×20111101860845² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20111101860799 and 20111101860808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011110186080 + ... + 2011110186089.

It is an arithmetic number, because the mean of its divisors is an integer number (6033330558255).

Almost surely, 2^{20111101860845} is an apocalyptic number.

It is an amenable number.

20111101860845 is a deficient number, since it is larger than the sum of its proper divisors (4022220372175).

20111101860845 is an equidigital number, since it uses as much as digits as its factorization.

20111101860845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022220372174.

The product of its (nonzero) digits is 15360, while the sum is 38.

Adding to 20111101860845 its reverse (54806810111102), we get a palindrome (74917911971947).

The spelling of 20111101860845 in words is "twenty trillion, one hundred eleven billion, one hundred one million, eight hundred sixty thousand, eight hundred forty-five".