18995568 has 20 divisors (see below), whose sum is σ = 49072008. Its totient is φ = 6331840.

The previous prime is 18995533. The next prime is 18995597. The reversal of 18995568 is 86559981.

It is a self number, because there is not a number n which added to its sum of digits gives 18995568.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 197823 + ... + 197918.

Almost surely, 2^18995568 is an apocalyptic number.

It is an amenable number.

18995568 is an abundant number, since it is smaller than the sum of its proper divisors (30076440).

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

18995568 is a wasteful number, since it uses less digits than its factorization.

18995568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395752 (or 395746 counting only the distinct ones).

The product of its digits is 777600, while the sum is 51.

The square root of 18995568 is about 4358.3905286241. The cubic root of 18995568 is about 266.8194152656.

The spelling of 18995568 in words is "eighteen million, nine hundred ninety-five thousand, five hundred sixty-eight".