21468395 has 16 divisors (see below), whose sum is σ = 28392672. Its totient is φ = 15482880.

The previous prime is 21468383. The next prime is 21468397. The reversal of 21468395 is 59386412.

It is a happy number.

It is not a de Polignac number, because 21468395 - 2¹² = 21464299 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21468397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1046 + ... + 6635.

It is an arithmetic number, because the mean of its divisors is an integer number (1774542).

Almost surely, 2^21468395 is an apocalyptic number.

21468395 is a deficient number, since it is larger than the sum of its proper divisors (6924277).

21468395 is a wasteful number, since it uses less digits than its factorization.

21468395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7742.

The product of its digits is 51840, while the sum is 38.

The square root of 21468395 is about 4633.3999395692. The cubic root of 21468395 is about 277.9285697128.

The spelling of 21468395 in words is "twenty-one million, four hundred sixty-eight thousand, three hundred ninety-five".