11837320243 has 4 divisors (see below), whose sum is σ = 13528366000. Its totient is φ = 10146274488.

The previous prime is 11837320241. The next prime is 11837320247. The reversal of 11837320243 is 34202373811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34202373811 = 31 ⋅1103302381.

It is not a de Polignac number, because 11837320243 - 2¹ = 11837320241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11837320199 and 11837320208.

It is not an unprimeable number, because it can be changed into a prime (11837320241) 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, 845522868 + ... + 845522881.

It is an arithmetic number, because the mean of its divisors is an integer number (3382091500).

Almost surely, 2^11837320243 is an apocalyptic number.

11837320243 is a deficient number, since it is larger than the sum of its proper divisors (1691045757).

11837320243 is an equidigital number, since it uses as much as digits as its factorization.

11837320243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691045756.

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 11837320243 in words is "eleven billion, eight hundred thirty-seven million, three hundred twenty thousand, two hundred forty-three".