18181818273829 has 8 divisors (see below), whose sum is σ = 20780333471360. Its totient is φ = 15583581223056.

The previous prime is 18181818273821. The next prime is 18181818273841. The reversal of 18181818273829 is 92837281818181.

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

It is not a de Polignac number, because 18181818273829 - 2³ = 18181818273821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18181818273821) 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, 69396594 + ... + 69658099.

It is an arithmetic number, because the mean of its divisors is an integer number (2597541683920).

Almost surely, 2^{18181818273829} is an apocalyptic number.

It is an amenable number.

18181818273829 is a deficient number, since it is larger than the sum of its proper divisors (2598515197531).

18181818273829 is a wasteful number, since it uses less digits than its factorization.

18181818273829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139073379.

The product of its digits is 24772608, while the sum is 67.

The spelling of 18181818273829 in words is "eighteen trillion, one hundred eighty-one billion, eight hundred eighteen million, two hundred seventy-three thousand, eight hundred twenty-nine".