18181840382 has 16 divisors (see below), whose sum is σ = 27433890000. Its totient is φ = 9037287168.

The previous prime is 18181840381. The next prime is 18181840387. The reversal of 18181840382 is 28304818181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18181840381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473633 + ... + 510579.

It is an arithmetic number, because the mean of its divisors is an integer number (1714618125).

Almost surely, 2^18181840382 is an apocalyptic number.

18181840382 is a deficient number, since it is larger than the sum of its proper divisors (9252049618).

18181840382 is a wasteful number, since it uses less digits than its factorization.

18181840382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38395.

The product of its (nonzero) digits is 98304, while the sum is 44.

The spelling of 18181840382 in words is "eighteen billion, one hundred eighty-one million, eight hundred forty thousand, three hundred eighty-two".