21164017 has 8 divisors (see below), whose sum is σ = 24230016. Its totient is φ = 18108672.

The previous prime is 21163999. The next prime is 21164029. The reversal of 21164017 is 71046112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21164017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21164047) 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, 2193 + ... + 6865.

It is an arithmetic number, because the mean of its divisors is an integer number (3028752).

Almost surely, 2^21164017 is an apocalyptic number.

It is an amenable number.

21164017 is a deficient number, since it is larger than the sum of its proper divisors (3065999).

21164017 is an equidigital number, since it uses as much as digits as its factorization.

21164017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5327.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 21164017 is about 4600.4366097143. The cubic root of 21164017 is about 276.6088263145.

The spelling of 21164017 in words is "twenty-one million, one hundred sixty-four thousand, seventeen".