18181373873 has 8 divisors (see below), whose sum is σ = 19700065728. Its totient is φ = 16679842704.

The previous prime is 18181373839. The next prime is 18181373893. The reversal of 18181373873 is 37837318181.

It is a happy number.

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 18181373873 - 2²⁶ = 18114265009 is a prime.

It is a super-3 number, since 3×18181373873³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18181373893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4287965 + ... + 4292202.

It is an arithmetic number, because the mean of its divisors is an integer number (2462508216).

Almost surely, 2^18181373873 is an apocalyptic number.

18181373873 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18181373873 is a deficient number, since it is larger than the sum of its proper divisors (1518691855).

18181373873 is a wasteful number, since it uses less digits than its factorization.

18181373873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8580343.

The product of its digits is 677376, while the sum is 50.

The spelling of 18181373873 in words is "eighteen billion, one hundred eighty-one million, three hundred seventy-three thousand, eight hundred seventy-three".