11386950821 has 4 divisors (see below), whose sum is σ = 11387167200. Its totient is φ = 11386734444.

The previous prime is 11386950811. The next prime is 11386950823. The reversal of 11386950821 is 12805968311.

11386950821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12805968311 = 229 ⋅55921259.

It is a cyclic number.

It is not a de Polignac number, because 11386950821 - 2¹⁰ = 11386949797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11386950823) 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 3 ways as a sum of consecutive naturals, for example, 27350 + ... + 153368.

It is an arithmetic number, because the mean of its divisors is an integer number (2846791800).

Almost surely, 2^11386950821 is an apocalyptic number.

It is an amenable number.

11386950821 is a deficient number, since it is larger than the sum of its proper divisors (216379).

11386950821 is an equidigital number, since it uses as much as digits as its factorization.

11386950821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216378.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 11386950821 in words is "eleven billion, three hundred eighty-six million, nine hundred fifty thousand, eight hundred twenty-one".