21446017 has 8 divisors (see below), whose sum is σ = 22291200. Its totient is φ = 20610480.

The previous prime is 21445981. The next prime is 21446039. The reversal of 21446017 is 71064412.

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 21446017 - 2¹⁹ = 20921729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21445982 and 21446000.

It is not an unprimeable number, because it can be changed into a prime (21446317) 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, 2298 + ... + 6940.

It is an arithmetic number, because the mean of its divisors is an integer number (2786400).

Almost surely, 2^21446017 is an apocalyptic number.

It is an amenable number.

21446017 is a deficient number, since it is larger than the sum of its proper divisors (845183).

21446017 is a wasteful number, since it uses less digits than its factorization.

21446017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4823.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 21446017 is about 4630.9844525759. The cubic root of 21446017 is about 277.8319680528.

The spelling of 21446017 in words is "twenty-one million, four hundred forty-six thousand, seventeen".