1844021818 has 8 divisors (see below), whose sum is σ = 2767080960. Its totient is φ = 921661500.

The previous prime is 1844021791. The next prime is 1844021819. The reversal of 1844021818 is 8181204481.

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

It is not an unprimeable number, because it can be changed into a prime (1844021819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168058 + ... + 178693.

It is an arithmetic number, because the mean of its divisors is an integer number (345885120).

Almost surely, 2^1844021818 is an apocalyptic number.

1844021818 is a deficient number, since it is larger than the sum of its proper divisors (923059142).

1844021818 is a wasteful number, since it uses less digits than its factorization.

1844021818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349412.

The product of its (nonzero) digits is 16384, while the sum is 37.

The square root of 1844021818 is about 42942.0751478081. The cubic root of 1844021818 is about 1226.2772889684.

The spelling of 1844021818 in words is "one billion, eight hundred forty-four million, twenty-one thousand, eight hundred eighteen".