21414365 has 8 divisors (see below), whose sum is σ = 29368320. Its totient is φ = 14684112.

The previous prime is 21414361. The next prime is 21414377. The reversal of 21414365 is 56341412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21414365 - 2² = 21414361 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414361) 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, 305885 + ... + 305954.

It is an arithmetic number, because the mean of its divisors is an integer number (3671040).

Almost surely, 2^21414365 is an apocalyptic number.

It is an amenable number.

21414365 is a deficient number, since it is larger than the sum of its proper divisors (7953955).

21414365 is an equidigital number, since it uses as much as digits as its factorization.

21414365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611851.

The product of its digits is 2880, while the sum is 26.

The square root of 21414365 is about 4627.5657747892. The cubic root of 21414365 is about 277.6952174493.

Adding to 21414365 its reverse (56341412), we get a palindrome (77755777).

The spelling of 21414365 in words is "twenty-one million, four hundred fourteen thousand, three hundred sixty-five".