11719849821 has 8 divisors (see below), whose sum is σ = 15989872800. Its totient is φ = 7631530032.

The previous prime is 11719849769. The next prime is 11719849927. The reversal of 11719849821 is 12894891711.

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

It is not a de Polignac number, because 11719849821 - 2⁷ = 11719849693 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11719849121) 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, 45425646 + ... + 45425903.

It is an arithmetic number, because the mean of its divisors is an integer number (1998734100).

Almost surely, 2^11719849821 is an apocalyptic number.

It is an amenable number.

11719849821 is a deficient number, since it is larger than the sum of its proper divisors (4270022979).

11719849821 is an equidigital number, since it uses as much as digits as its factorization.

11719849821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90851595.

The product of its digits is 290304, while the sum is 51.

The spelling of 11719849821 in words is "eleven billion, seven hundred nineteen million, eight hundred forty-nine thousand, eight hundred twenty-one".