13563660 has 48 divisors (see below), whose sum is σ = 41432832. Its totient is φ = 3288000.

The previous prime is 13563653. The next prime is 13563673. The reversal of 13563660 is 6636531.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9616 + ... + 10935.

It is an arithmetic number, because the mean of its divisors is an integer number (863184).

Almost surely, 2^13563660 is an apocalyptic number.

13563660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13563660 is an abundant number, since it is smaller than the sum of its proper divisors (27869172).

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

13563660 is a wasteful number, since it uses less digits than its factorization.

13563660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20574 (or 20572 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 13563660 is about 3682.8874541588. The cubic root of 13563660 is about 238.4838449210.

The spelling of 13563660 in words is "thirteen million, five hundred sixty-three thousand, six hundred sixty".