18163680 has 96 divisors (see below), whose sum is σ = 58060800. Its totient is φ = 4772352.

The previous prime is 18163679. The next prime is 18163693. The reversal of 18163680 is 8636181.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×18163680² = 659838542284800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 37681 + ... + 38159.

It is an arithmetic number, because the mean of its divisors is an integer number (604800).

Almost surely, 2^18163680 is an apocalyptic number.

18163680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18163680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29030400).

18163680 is an abundant number, since it is smaller than the sum of its proper divisors (39897120).

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

18163680 is a wasteful number, since it uses less digits than its factorization.

18163680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 18163680 is about 4261.8869060546. The cubic root of 18163680 is about 262.8661195062.

The spelling of 18163680 in words is "eighteen million, one hundred sixty-three thousand, six hundred eighty".