18018843662 has 4 divisors (see below), whose sum is σ = 27028265496. Its totient is φ = 9009421830.

The previous prime is 18018843659. The next prime is 18018843671. The reversal of 18018843662 is 26634881081.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4504710914 + ... + 4504710917.

It is an arithmetic number, because the mean of its divisors is an integer number (6757066374).

Almost surely, 2^18018843662 is an apocalyptic number.

18018843662 is a deficient number, since it is larger than the sum of its proper divisors (9009421834).

18018843662 is an equidigital number, since it uses as much as digits as its factorization.

18018843662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9009421833.

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 18018843662 in words is "eighteen billion, eighteen million, eight hundred forty-three thousand, six hundred sixty-two".