21968341 has 8 divisors (see below), whose sum is σ = 23156280. Its totient is φ = 20809152.

The previous prime is 21968321. The next prime is 21968347. The reversal of 21968341 is 14386912.

It can be written as a sum of positive squares in 4 ways, for example, as 531441 + 21436900 = 729^2 + 4630^2 .

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 21968341 - 2¹¹ = 21966293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21968297 and 21968306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21968347) 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, 5610 + ... + 8683.

It is an arithmetic number, because the mean of its divisors is an integer number (2894535).

Almost surely, 2^21968341 is an apocalyptic number.

It is an amenable number.

21968341 is a deficient number, since it is larger than the sum of its proper divisors (1187939).

21968341 is a wasteful number, since it uses less digits than its factorization.

21968341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14375.

The product of its digits is 10368, while the sum is 34.

The square root of 21968341 is about 4687.0396840650. The cubic root of 21968341 is about 280.0694598084.

The spelling of 21968341 in words is "twenty-one million, nine hundred sixty-eight thousand, three hundred forty-one".