18181838281910 has 8 divisors (see below), whose sum is σ = 32727308907456. Its totient is φ = 7272735312760.

The previous prime is 18181838281909. The next prime is 18181838281973. The reversal of 18181838281910 is 1918283818181.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18181838281910.

It is a congruent number.

It is an unprimeable number.

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, 909091914086 + ... + 909091914105.

It is an arithmetic number, because the mean of its divisors is an integer number (4090913613432).

Almost surely, 2^{18181838281910} is an apocalyptic number.

18181838281910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18181838281910 is a deficient number, since it is larger than the sum of its proper divisors (14545470625546).

18181838281910 is a wasteful number, since it uses less digits than its factorization.

18181838281910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818183828198.

The product of its (nonzero) digits is 1769472, while the sum is 59.

The spelling of 18181838281910 in words is "eighteen trillion, one hundred eighty-one billion, eight hundred thirty-eight million, two hundred eighty-one thousand, nine hundred ten".