18055582 has 4 divisors (see below), whose sum is σ = 27083376. Its totient is φ = 9027790.

The previous prime is 18055577. The next prime is 18055589. The reversal of 18055582 is 28555081.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18055589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4513894 + ... + 4513897.

It is an arithmetic number, because the mean of its divisors is an integer number (6770844).

Almost surely, 2^18055582 is an apocalyptic number.

18055582 is a deficient number, since it is larger than the sum of its proper divisors (9027794).

18055582 is an equidigital number, since it uses as much as digits as its factorization.

18055582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9027793.

The product of its (nonzero) digits is 16000, while the sum is 34.

The square root of 18055582 is about 4249.1860397022. The cubic root of 18055582 is about 262.3436141826.

The spelling of 18055582 in words is "eighteen million, fifty-five thousand, five hundred eighty-two".