20116405011 has 4 divisors (see below), whose sum is σ = 26821873352. Its totient is φ = 13410936672.

The previous prime is 20116404967. The next prime is 20116405033. The reversal of 20116405011 is 11050461102.

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

It is not a de Polignac number, because 20116405011 - 2⁹ = 20116404499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20116405091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3352734166 + ... + 3352734171.

It is an arithmetic number, because the mean of its divisors is an integer number (6705468338).

Almost surely, 2^20116405011 is an apocalyptic number.

20116405011 is a deficient number, since it is larger than the sum of its proper divisors (6705468341).

20116405011 is an equidigital number, since it uses as much as digits as its factorization.

20116405011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6705468340.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 20116405011 its reverse (11050461102), we get a palindrome (31166866113).

The spelling of 20116405011 in words is "twenty billion, one hundred sixteen million, four hundred five thousand, eleven".