13621330 has 16 divisors (see below), whose sum is σ = 24935040. Its totient is φ = 5355952.

The previous prime is 13621319. The next prime is 13621331. The reversal of 13621330 is 3312631.

It is a junction number, because it is equal to n+sod(n) for n = 13621298 and 13621307.

It is not an unprimeable number, because it can be changed into a prime (13621331) 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, 10954 + ... + 12133.

It is an arithmetic number, because the mean of its divisors is an integer number (1558440).

Almost surely, 2^13621330 is an apocalyptic number.

13621330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13621330 is a deficient number, since it is larger than the sum of its proper divisors (11313710).

13621330 is a wasteful number, since it uses less digits than its factorization.

13621330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23153.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 13621330 is about 3690.7086040488. The cubic root of 13621330 is about 238.8213624016.

Adding to 13621330 its reverse (3312631), we get a palindrome (16933961).

The spelling of 13621330 in words is "thirteen million, six hundred twenty-one thousand, three hundred thirty".