13643020 has 12 divisors (see below), whose sum is σ = 28650384. Its totient is φ = 5457200.

The previous prime is 13643017. The next prime is 13643023. The reversal of 13643020 is 2034631.

It is an interprime number because it is at equal distance from previous prime (13643017) and next prime (13643023).

It is a super-2 number, since 2×13643020² = 372263989440800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13643023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341056 + ... + 341095.

It is an arithmetic number, because the mean of its divisors is an integer number (2387532).

Almost surely, 2^13643020 is an apocalyptic number.

13643020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13643020 is an abundant number, since it is smaller than the sum of its proper divisors (15007364).

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

13643020 is a wasteful number, since it uses less digits than its factorization.

13643020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682160 (or 682158 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 13643020 is about 3693.6458953181. The cubic root of 13643020 is about 238.9480580154.

Adding to 13643020 its reverse (2034631), we get a palindrome (15677651).

The spelling of 13643020 in words is "thirteen million, six hundred forty-three thousand, twenty".