18381838382 has 8 divisors (see below), whose sum is σ = 29023955400. Its totient is φ = 8707186584.

The previous prime is 18381838381. The next prime is 18381838403. The reversal of 18381838382 is 28383818381.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18381838381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241866257 + ... + 241866332.

It is an arithmetic number, because the mean of its divisors is an integer number (3627994425).

Almost surely, 2^18381838382 is an apocalyptic number.

18381838382 is a deficient number, since it is larger than the sum of its proper divisors (10642117018).

18381838382 is a wasteful number, since it uses less digits than its factorization.

18381838382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483732610.

The product of its digits is 1769472, while the sum is 53.

The spelling of 18381838382 in words is "eighteen billion, three hundred eighty-one million, eight hundred thirty-eight thousand, three hundred eighty-two".