20011104243 has 64 divisors (see below), whose sum is σ = 34233292800. Its totient is φ = 11443161600.

The previous prime is 20011104149. The next prime is 20011104257. The reversal of 20011104243 is 34240111002.

It is not a de Polignac number, because 20011104243 - 2⁹ = 20011103731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011104143) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 450168 + ... + 492618.

It is an arithmetic number, because the mean of its divisors is an integer number (534895200).

Almost surely, 2^20011104243 is an apocalyptic number.

20011104243 is a deficient number, since it is larger than the sum of its proper divisors (14222188557).

20011104243 is a wasteful number, since it uses less digits than its factorization.

20011104243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42569 (or 42563 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20011104243 its reverse (34240111002), we get a palindrome (54251215245).

The spelling of 20011104243 in words is "twenty billion, eleven million, one hundred four thousand, two hundred forty-three".