13563420 has 48 divisors (see below), whose sum is σ = 40901280. Its totient is φ = 3338496.

The previous prime is 13563419. The next prime is 13563439. The reversal of 13563420 is 2436531.

It is a happy number.

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, 7915 + ... + 9474.

It is an arithmetic number, because the mean of its divisors is an integer number (852110).

Almost surely, 2^13563420 is an apocalyptic number.

13563420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13563420 is an abundant number, since it is smaller than the sum of its proper divisors (27337860).

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

13563420 is a wasteful number, since it uses less digits than its factorization.

13563420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17414 (or 17412 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 13563420 is about 3682.8548708848. The cubic root of 13563420 is about 238.4824383080.

Adding to 13563420 its reverse (2436531), we get a palindrome (15999951).

The spelling of 13563420 in words is "thirteen million, five hundred sixty-three thousand, four hundred twenty".