21468841 has 8 divisors (see below), whose sum is σ = 23928480. Its totient is φ = 19142208.

The previous prime is 21468829. The next prime is 21468899. The reversal of 21468841 is 14886412.

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 21468841 - 2⁵ = 21468809 is a prime.

It is a super-2 number, since 2×21468841² = 921822267766562, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21468797 and 21468806.

It is not an unprimeable number, because it can be changed into a prime (21465841) 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, 32911 + ... + 33556.

It is an arithmetic number, because the mean of its divisors is an integer number (2991060).

Almost surely, 2^21468841 is an apocalyptic number.

It is an amenable number.

21468841 is a deficient number, since it is larger than the sum of its proper divisors (2459639).

21468841 is a wasteful number, since it uses less digits than its factorization.

21468841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66503.

The product of its digits is 12288, while the sum is 34.

The square root of 21468841 is about 4633.4480681238. The cubic root of 21468841 is about 277.9304943294.

The spelling of 21468841 in words is "twenty-one million, four hundred sixty-eight thousand, eight hundred forty-one".