1816382443 has 8 divisors (see below), whose sum is σ = 1834979328. Its totient is φ = 1797804264.

The previous prime is 1816382413. The next prime is 1816382461. The reversal of 1816382443 is 3442836181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1816382443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1816382396 and 1816382405.

It is not an unprimeable number, because it can be changed into a prime (1816382413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273480 + ... + 280042.

It is an arithmetic number, because the mean of its divisors is an integer number (229372416).

Almost surely, 2^1816382443 is an apocalyptic number.

1816382443 is a deficient number, since it is larger than the sum of its proper divisors (18596885).

1816382443 is a wasteful number, since it uses less digits than its factorization.

1816382443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9353.

The product of its digits is 110592, while the sum is 40.

The square root of 1816382443 is about 42619.0385039362. The cubic root of 1816382443 is about 1220.1196789787.

The spelling of 1816382443 in words is "one billion, eight hundred sixteen million, three hundred eighty-two thousand, four hundred forty-three".