1812203343 has 6 divisors (see below), whose sum is σ = 2617627064. Its totient is φ = 1208135556.

The previous prime is 1812203329. The next prime is 1812203347. The reversal of 1812203343 is 3433022181.

It is not a de Polignac number, because 1812203343 - 2¹² = 1812199247 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 (1812203347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100677955 + ... + 100677972.

Almost surely, 2^1812203343 is an apocalyptic number.

1812203343 is a deficient number, since it is larger than the sum of its proper divisors (805423721).

1812203343 is a wasteful number, since it uses less digits than its factorization.

1812203343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201355933 (or 201355930 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1812203343 is about 42569.9817124696. The cubic root of 1812203343 is about 1219.1832172880.

The spelling of 1812203343 in words is "one billion, eight hundred twelve million, two hundred three thousand, three hundred forty-three".