20404312111 has 8 divisors (see below), whose sum is σ = 20522420864. Its totient is φ = 20286405720.

The previous prime is 20404312091. The next prime is 20404312121. The reversal of 20404312111 is 11121340402.

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

It is a cyclic number.

It is not a de Polignac number, because 20404312111 - 2⁵ = 20404312079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404312121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154036 + ... + 254038.

It is an arithmetic number, because the mean of its divisors is an integer number (2565302608).

Almost surely, 2^20404312111 is an apocalyptic number.

20404312111 is a deficient number, since it is larger than the sum of its proper divisors (118108753).

20404312111 is a wasteful number, since it uses less digits than its factorization.

20404312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101181.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20404312111 its reverse (11121340402), we get a palindrome (31525652513).

The spelling of 20404312111 in words is "twenty billion, four hundred four million, three hundred twelve thousand, one hundred eleven".