1821124118 has 16 divisors (see below), whose sum is σ = 2980704960. Its totient is φ = 827593800.

The previous prime is 1821124111. The next prime is 1821124121. The reversal of 1821124118 is 8114211281.

It is a super-2 number, since 2×1821124118² = 6632986106322555848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821124111) 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, 143033 + ... + 155243.

It is an arithmetic number, because the mean of its divisors is an integer number (186294060).

Almost surely, 2^1821124118 is an apocalyptic number.

1821124118 is a deficient number, since it is larger than the sum of its proper divisors (1159580842).

1821124118 is a wasteful number, since it uses less digits than its factorization.

1821124118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19003.

The product of its digits is 1024, while the sum is 29.

The square root of 1821124118 is about 42674.6308478468. The cubic root of 1821124118 is about 1221.1804658574.

Adding to 1821124118 its reverse (8114211281), we get a palindrome (9935335399).

The spelling of 1821124118 in words is "one billion, eight hundred twenty-one million, one hundred twenty-four thousand, one hundred eighteen".