1812456843 has 12 divisors (see below), whose sum is σ = 2439451560. Its totient is φ = 1196989312.

The previous prime is 1812456823. The next prime is 1812456851. The reversal of 1812456843 is 3486542181.

It is a happy number.

1812456843 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1812456843 - 2¹⁰ = 1812455819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1812456795 and 1812456804.

It is not an unprimeable number, because it can be changed into a prime (1812456823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7963 + ... + 60731.

It is an arithmetic number, because the mean of its divisors is an integer number (203287630).

Almost surely, 2^1812456843 is an apocalyptic number.

1812456843 is a deficient number, since it is larger than the sum of its proper divisors (626994717).

1812456843 is an equidigital number, since it uses as much as digits as its factorization.

1812456843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52986 (or 52879 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 1812456843 is about 42572.9590585386. The cubic root of 1812456843 is about 1219.2400631044.

The spelling of 1812456843 in words is "one billion, eight hundred twelve million, four hundred fifty-six thousand, eight hundred forty-three".