1812320369 has 8 divisors (see below), whose sum is σ = 1841185728. Its totient is φ = 1783547920.

The previous prime is 1812320327. The next prime is 1812320371. The reversal of 1812320369 is 9630232181.

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

It is a cyclic number.

It is not a de Polignac number, because 1812320369 - 2¹⁶ = 1812254833 is a prime.

It is a super-2 number, since 2×1812320369² = 6569010239784592322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1812820369) 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 7 ways as a sum of consecutive naturals, for example, 16634 + ... + 62460.

It is an arithmetic number, because the mean of its divisors is an integer number (230148216).

Almost surely, 2^1812320369 is an apocalyptic number.

It is an amenable number.

1812320369 is a deficient number, since it is larger than the sum of its proper divisors (28865359).

1812320369 is an equidigital number, since it uses as much as digits as its factorization.

1812320369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46455.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1812320369 is about 42571.3562034380. The cubic root of 1812320369 is about 1219.2094603077.

The spelling of 1812320369 in words is "one billion, eight hundred twelve million, three hundred twenty thousand, three hundred sixty-nine".