20400004011 has 8 divisors (see below), whose sum is σ = 27225032704. Its totient is φ = 13587489000.

The previous prime is 20400004007. The next prime is 20400004111. The reversal of 20400004011 is 11040000402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20400004011 - 2² = 20400004007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20400004111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3124615 + ... + 3131136.

It is an arithmetic number, because the mean of its divisors is an integer number (3403129088).

Almost surely, 2^20400004011 is an apocalyptic number.

20400004011 is a deficient number, since it is larger than the sum of its proper divisors (6825028693).

20400004011 is a wasteful number, since it uses less digits than its factorization.

20400004011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6256841.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20400004011 its reverse (11040000402), we get a palindrome (31440004413).

It can be divided in two parts, 2040000401 and 1, that added together give a palindrome (2040000402).

The spelling of 20400004011 in words is "twenty billion, four hundred million, four thousand, eleven".