20403111411 has 16 divisors (see below), whose sum is σ = 31817718400. Its totient is φ = 12886175304.

The previous prime is 20403111401. The next prime is 20403111431. The reversal of 20403111411 is 11411130402.

It is not a de Polignac number, because 20403111411 - 2¹⁸ = 20402849267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20403111401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19885561 + ... + 19886586.

It is an arithmetic number, because the mean of its divisors is an integer number (1988607400).

Almost surely, 2^20403111411 is an apocalyptic number.

20403111411 is a deficient number, since it is larger than the sum of its proper divisors (11414606989).

20403111411 is a wasteful number, since it uses less digits than its factorization.

20403111411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39772175 (or 39772169 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20403111411 its reverse (11411130402), we get a palindrome (31814241813).

The spelling of 20403111411 in words is "twenty billion, four hundred three million, one hundred eleven thousand, four hundred eleven".