20400411011 has 4 divisors (see below), whose sum is σ = 20407312992. Its totient is φ = 20393509032.

The previous prime is 20400410999. The next prime is 20400411013. The reversal of 20400411011 is 11011400402.

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

It is a cyclic number.

It is not a de Polignac number, because 20400411011 - 2¹⁰ = 20400409987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20400411013) 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, 3446555 + ... + 3452468.

It is an arithmetic number, because the mean of its divisors is an integer number (5101828248).

Almost surely, 2^20400411011 is an apocalyptic number.

20400411011 is a deficient number, since it is larger than the sum of its proper divisors (6901981).

20400411011 is an equidigital number, since it uses as much as digits as its factorization.

20400411011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6901980.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20400411011 its reverse (11011400402), we get a palindrome (31411811413).

The spelling of 20400411011 in words is "twenty billion, four hundred million, four hundred eleven thousand, eleven".