11821875443 has 4 divisors (see below), whose sum is σ = 13510714800. Its totient is φ = 10133036088.

The previous prime is 11821875431. The next prime is 11821875493. The reversal of 11821875443 is 34457812811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34457812811 = 239 ⋅144174949.

It is not a de Polignac number, because 11821875443 - 2¹⁴ = 11821859059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11821875394 and 11821875403.

It is not an unprimeable number, because it can be changed into a prime (11821875493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844419668 + ... + 844419681.

It is an arithmetic number, because the mean of its divisors is an integer number (3377678700).

Almost surely, 2^11821875443 is an apocalyptic number.

11821875443 is a deficient number, since it is larger than the sum of its proper divisors (1688839357).

11821875443 is an equidigital number, since it uses as much as digits as its factorization.

11821875443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688839356.

The product of its digits is 215040, while the sum is 44.

The spelling of 11821875443 in words is "eleven billion, eight hundred twenty-one million, eight hundred seventy-five thousand, four hundred forty-three".