19812442711 has 4 divisors (see below), whose sum is σ = 19857574000. Its totient is φ = 19767311424.

The previous prime is 19812442709. The next prime is 19812442733. The reversal of 19812442711 is 11724421891.

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 19812442711 - 2¹ = 19812442709 is a prime.

It is a super-3 number, since 3×19812442711³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16812442711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22564986 + ... + 22565863.

It is an arithmetic number, because the mean of its divisors is an integer number (4964393500).

Almost surely, 2^19812442711 is an apocalyptic number.

19812442711 is a deficient number, since it is larger than the sum of its proper divisors (45131289).

19812442711 is an equidigital number, since it uses as much as digits as its factorization.

19812442711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45131288.

The product of its digits is 32256, while the sum is 40.

The spelling of 19812442711 in words is "nineteen billion, eight hundred twelve million, four hundred forty-two thousand, seven hundred eleven".