11821419009 has 12 divisors (see below), whose sum is σ = 17180142096. Its totient is φ = 7832595672.

The previous prime is 11821418863. The next prime is 11821419011. The reversal of 11821419009 is 90091412811.

It is not a de Polignac number, because 11821419009 - 2²³ = 11813030401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11821419059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4027647 + ... + 4030580.

It is an arithmetic number, because the mean of its divisors is an integer number (1431678508).

Almost surely, 2^11821419009 is an apocalyptic number.

It is an amenable number.

11821419009 is a deficient number, since it is larger than the sum of its proper divisors (5358723087).

11821419009 is a wasteful number, since it uses less digits than its factorization.

11821419009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8058396 (or 8058393 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The spelling of 11821419009 in words is "eleven billion, eight hundred twenty-one million, four hundred nineteen thousand, nine".