19400311211 has 4 divisors (see below), whose sum is σ = 19400700000. Its totient is φ = 19399922424.

The previous prime is 19400311201. The next prime is 19400311223. The reversal of 19400311211 is 11211300491.

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 19400311211 - 2¹⁰ = 19400310187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19400311201) 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, 106211 + ... + 223788.

It is an arithmetic number, because the mean of its divisors is an integer number (4850175000).

Almost surely, 2^19400311211 is an apocalyptic number.

19400311211 is a deficient number, since it is larger than the sum of its proper divisors (388789).

19400311211 is an equidigital number, since it uses as much as digits as its factorization.

19400311211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388788.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 19400311211 in words is "nineteen billion, four hundred million, three hundred eleven thousand, two hundred eleven".