21334009 has 8 divisors (see below), whose sum is σ = 21714048. Its totient is φ = 20956320.

The previous prime is 21334007. The next prime is 21334039. The reversal of 21334009 is 90043312.

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 21334009 - 2¹ = 21334007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21334007) 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, 34269 + ... + 34885.

It is an arithmetic number, because the mean of its divisors is an integer number (2714256).

Almost surely, 2^21334009 is an apocalyptic number.

It is an amenable number.

21334009 is a deficient number, since it is larger than the sum of its proper divisors (380039).

21334009 is an equidigital number, since it uses as much as digits as its factorization.

21334009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 21334009 is about 4618.8752960001. The cubic root of 21334009 is about 277.3474377162.

The spelling of 21334009 in words is "twenty-one million, three hundred thirty-four thousand, nine".