13663420 has 24 divisors (see below), whose sum is σ = 28993104. Its totient is φ = 5408256.

The previous prime is 13663399. The next prime is 13663423. The reversal of 13663420 is 2436631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13663423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1582 + ... + 5461.

It is an arithmetic number, because the mean of its divisors is an integer number (1208046).

Almost surely, 2^13663420 is an apocalyptic number.

13663420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13663420 is an abundant number, since it is smaller than the sum of its proper divisors (15329684).

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

13663420 is a wasteful number, since it uses less digits than its factorization.

13663420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7149 (or 7147 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 13663420 is about 3696.4063629423. The cubic root of 13663420 is about 239.0670960000.

The spelling of 13663420 in words is "thirteen million, six hundred sixty-three thousand, four hundred twenty".