21468805 has 8 divisors (see below), whose sum is σ = 26013312. Its totient is φ = 17007888.

The previous prime is 21468793. The next prime is 21468809. The reversal of 21468805 is 50886412.

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 21468805 - 2⁷ = 21468677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21468809) 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, 20329 + ... + 21358.

It is an arithmetic number, because the mean of its divisors is an integer number (3251664).

Almost surely, 2^21468805 is an apocalyptic number.

It is an amenable number.

21468805 is a deficient number, since it is larger than the sum of its proper divisors (4544507).

21468805 is a wasteful number, since it uses less digits than its factorization.

21468805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41795.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 21468805 is about 4633.4441833263. Note that the first 3 decimals coincide. The cubic root of 21468805 is about 277.9303389801.

The spelling of 21468805 in words is "twenty-one million, four hundred sixty-eight thousand, eight hundred five".