1811822124 has 48 divisors (see below), whose sum is σ = 5115737088. Its totient is φ = 487212288.

The previous prime is 1811822087. The next prime is 1811822143. The reversal of 1811822124 is 4212281181.

It is a junction number, because it is equal to n+sod(n) for n = 1811822091 and 1811822100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 632964 + ... + 635819.

It is an arithmetic number, because the mean of its divisors is an integer number (106577856).

Almost surely, 2^1811822124 is an apocalyptic number.

1811822124 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1811822124 is an abundant number, since it is smaller than the sum of its proper divisors (3303914964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1811822124 is a wasteful number, since it uses less digits than its factorization.

1811822124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268814 (or 1268812 counting only the distinct ones).

The product of its digits is 2048, while the sum is 30.

The square root of 1811822124 is about 42565.5039204283. The cubic root of 1811822124 is about 1219.0977212898.

The spelling of 1811822124 in words is "one billion, eight hundred eleven million, eight hundred twenty-two thousand, one hundred twenty-four".