21334163 has 8 divisors (see below), whose sum is σ = 21969168. Its totient is φ = 20702304.

The previous prime is 21334153. The next prime is 21334171. The reversal of 21334163 is 36143312.

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 21334163 - 2¹⁰ = 21333139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21334123) 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, 23720 + ... + 24602.

It is an arithmetic number, because the mean of its divisors is an integer number (2746146).

Almost surely, 2^21334163 is an apocalyptic number.

21334163 is a deficient number, since it is larger than the sum of its proper divisors (635005).

21334163 is an equidigital number, since it uses as much as digits as its factorization.

21334163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573.

The product of its digits is 1296, while the sum is 23.

The square root of 21334163 is about 4618.8919666950. The cubic root of 21334163 is about 277.3481050608.

Adding to 21334163 its reverse (36143312), we get a palindrome (57477475).

The spelling of 21334163 in words is "twenty-one million, three hundred thirty-four thousand, one hundred sixty-three".