13663020 has 48 divisors (see below), whose sum is σ = 43723008. Its totient is φ = 3122880.

The previous prime is 13663009. The next prime is 13663037. The reversal of 13663020 is 2036631.

13663020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 15846 + ... + 16685.

It is an arithmetic number, because the mean of its divisors is an integer number (910896).

Almost surely, 2^13663020 is an apocalyptic number.

13663020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13663020 is an abundant number, since it is smaller than the sum of its proper divisors (30059988).

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

13663020 is a wasteful number, since it uses less digits than its factorization.

13663020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32550 (or 32548 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 13663020 is about 3696.3522559410. The cubic root of 13663020 is about 239.0647630612.

Adding to 13663020 its reverse (2036631), we get a palindrome (15699651).

The spelling of 13663020 in words is "thirteen million, six hundred sixty-three thousand, twenty".