13621366 has 16 divisors (see below), whose sum is σ = 23463360. Its totient is φ = 5865480.

The previous prime is 13621357. The next prime is 13621367. The reversal of 13621366 is 66312631.

It is a super-2 number, since 2×13621366² = 371083223411912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13621367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15876 + ... + 16711.

It is an arithmetic number, because the mean of its divisors is an integer number (1466460).

Almost surely, 2^13621366 is an apocalyptic number.

13621366 is a deficient number, since it is larger than the sum of its proper divisors (9841994).

13621366 is a wasteful number, since it uses less digits than its factorization.

13621366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32619.

The product of its digits is 3888, while the sum is 28.

The square root of 13621366 is about 3690.7134811578. The cubic root of 13621366 is about 238.8215727962.

Adding to 13621366 its reverse (66312631), we get a palindrome (79933997).

The spelling of 13621366 in words is "thirteen million, six hundred twenty-one thousand, three hundred sixty-six".