11839093821 has 6 divisors (see below), whose sum is σ = 17100913310. Its totient is φ = 7892729208.

The previous prime is 11839093793. The next prime is 11839093873. The reversal of 11839093821 is 12839093811.

11839093821 is a `hidden beast` number, since 1 + 183 + 90 + 9 + 382 + 1 = 666.

11839093821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7576832025 + 4262261796 = 87045^2 + 65286^2 .

It is not a de Polignac number, because 11839093821 - 2⁶ = 11839093757 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 (11839093891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 657727426 + ... + 657727443.

Almost surely, 2^11839093821 is an apocalyptic number.

It is an amenable number.

11839093821 is a deficient number, since it is larger than the sum of its proper divisors (5261819489).

11839093821 is a wasteful number, since it uses less digits than its factorization.

11839093821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315454875 (or 1315454872 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The spelling of 11839093821 in words is "eleven billion, eight hundred thirty-nine million, ninety-three thousand, eight hundred twenty-one".