18581836382 has 4 divisors (see below), whose sum is σ = 27872754576. Its totient is φ = 9290918190.

The previous prime is 18581836363. The next prime is 18581836393. The reversal of 18581836382 is 28363818581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28363818581 = 7 ⋅4051974083.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4645459094 + ... + 4645459097.

It is an arithmetic number, because the mean of its divisors is an integer number (6968188644).

Almost surely, 2^18581836382 is an apocalyptic number.

18581836382 is a deficient number, since it is larger than the sum of its proper divisors (9290918194).

18581836382 is an equidigital number, since it uses as much as digits as its factorization.

18581836382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9290918193.

The product of its digits is 2211840, while the sum is 53.

The spelling of 18581836382 in words is "eighteen billion, five hundred eighty-one million, eight hundred thirty-six thousand, three hundred eighty-two".