1841218805 has 16 divisors (see below), whose sum is σ = 2284313088. Its totient is φ = 1423224000.

The previous prime is 1841218801. The next prime is 1841218817. The reversal of 1841218805 is 5088121481.

It is not a de Polignac number, because 1841218805 - 2² = 1841218801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1841218801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93470 + ... + 111440.

It is an arithmetic number, because the mean of its divisors is an integer number (142769568).

Almost surely, 2^1841218805 is an apocalyptic number.

It is an amenable number.

1841218805 is a deficient number, since it is larger than the sum of its proper divisors (443094283).

1841218805 is a wasteful number, since it uses less digits than its factorization.

1841218805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18668.

The product of its (nonzero) digits is 20480, while the sum is 38.

The square root of 1841218805 is about 42909.4255962487. The cubic root of 1841218805 is about 1225.6556379239.

The spelling of 1841218805 in words is "one billion, eight hundred forty-one million, two hundred eighteen thousand, eight hundred five".