11209861423 has 4 divisors (see below), whose sum is σ = 11571469888. Its totient is φ = 10848252960.

The previous prime is 11209861379. The next prime is 11209861441. The reversal of 11209861423 is 32416890211.

11209861423 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 an emirpimes, since its reverse is a distinct semiprime: 32416890211 = 1319 ⋅24576869.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11209861423 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 (11209861493) 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, 180804186 + ... + 180804247.

It is an arithmetic number, because the mean of its divisors is an integer number (2892867472).

Almost surely, 2^11209861423 is an apocalyptic number.

11209861423 is a deficient number, since it is larger than the sum of its proper divisors (361608465).

11209861423 is an equidigital number, since it uses as much as digits as its factorization.

11209861423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361608464.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 11209861423 in words is "eleven billion, two hundred nine million, eight hundred sixty-one thousand, four hundred twenty-three".