21468355 has 8 divisors (see below), whose sum is σ = 25896672. Its totient is φ = 17084928.

The previous prime is 21468353. The next prime is 21468371. The reversal of 21468355 is 55386412.

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 21468355 - 2¹ = 21468353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21468355.

It is not an unprimeable number, because it can be changed into a prime (21468353) 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, 10159 + ... + 12088.

It is an arithmetic number, because the mean of its divisors is an integer number (3237084).

Almost surely, 2^21468355 is an apocalyptic number.

21468355 is a deficient number, since it is larger than the sum of its proper divisors (4428317).

21468355 is a wasteful number, since it uses less digits than its factorization.

21468355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22445.

The product of its digits is 28800, while the sum is 34.

The square root of 21468355 is about 4633.3956230825. The cubic root of 21468355 is about 277.9283971002.

It can be divided in two parts, 2146 and 8355, that added together give a palindrome (10501).

The spelling of 21468355 in words is "twenty-one million, four hundred sixty-eight thousand, three hundred fifty-five".