18645560 has 16 divisors (see below), whose sum is σ = 41952600. Its totient is φ = 7458208.

The previous prime is 18645551. The next prime is 18645577. The reversal of 18645560 is 6554681.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18645560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233030 + ... + 233109.

Almost surely, 2^18645560 is an apocalyptic number.

18645560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18645560 is an abundant number, since it is smaller than the sum of its proper divisors (23307040).

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

18645560 is a wasteful number, since it uses less digits than its factorization.

18645560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466150 (or 466146 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 18645560 is about 4318.0504860411. The cubic root of 18645560 is about 265.1704611119.

The spelling of 18645560 in words is "eighteen million, six hundred forty-five thousand, five hundred sixty".