1812861134 has 12 divisors (see below), whose sum is σ = 3163257864. Its totient is φ = 776940444.

The previous prime is 1812861133. The next prime is 1812861151. The reversal of 1812861134 is 4311682181.

It is a junction number, because it is equal to n+sod(n) for n = 1812861094 and 1812861103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812861133) 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, 9249194 + ... + 9249389.

It is an arithmetic number, because the mean of its divisors is an integer number (263604822).

Almost surely, 2^1812861134 is an apocalyptic number.

1812861134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1812861134 is a deficient number, since it is larger than the sum of its proper divisors (1350396730).

1812861134 is a wasteful number, since it uses less digits than its factorization.

1812861134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18498599 (or 18498592 counting only the distinct ones).

The product of its digits is 9216, while the sum is 35.

The square root of 1812861134 is about 42577.7070073061. The cubic root of 1812861134 is about 1219.3307119089.

The spelling of 1812861134 in words is "one billion, eight hundred twelve million, eight hundred sixty-one thousand, one hundred thirty-four".