18201648 has 40 divisors (see below), whose sum is σ = 49068288. Its totient is φ = 5803072.

The previous prime is 18201629. The next prime is 18201649. The reversal of 18201648 is 84610281.

It is not an unprimeable number, because it can be changed into a prime (18201649) 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 in 7 ways as a sum of consecutive naturals, for example, 7140 + ... + 9347.

Almost surely, 2^18201648 is an apocalyptic number.

It is an amenable number.

18201648 is an abundant number, since it is smaller than the sum of its proper divisors (30866640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18201648 is a wasteful number, since it uses less digits than its factorization.

18201648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16521 (or 16515 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 18201648 is about 4266.3389457473. The cubic root of 18201648 is about 263.0491506013.

The spelling of 18201648 in words is "eighteen million, two hundred one thousand, six hundred forty-eight".