18041800819 has 8 divisors (see below), whose sum is σ = 20623097088. Its totient is φ = 15461478600.

The previous prime is 18041800811. The next prime is 18041800823. The reversal of 18041800819 is 91800814081.

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

It is a cyclic number.

It is not a de Polignac number, because 18041800819 - 2³ = 18041800811 is a prime.

It is a super-2 number, since 2×18041800819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18041800811) 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, 203377 + ... + 278290.

It is an arithmetic number, because the mean of its divisors is an integer number (2577887136).

Almost surely, 2^18041800819 is an apocalyptic number.

18041800819 is a deficient number, since it is larger than the sum of its proper divisors (2581296269).

18041800819 is an equidigital number, since it uses as much as digits as its factorization.

18041800819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487025.

The product of its (nonzero) digits is 18432, while the sum is 40.

The spelling of 18041800819 in words is "eighteen billion, forty-one million, eight hundred thousand, eight hundred nineteen".