21336006 has 8 divisors (see below), whose sum is σ = 42672024. Its totient is φ = 7112000.

The previous prime is 21336001. The next prime is 21336017. The reversal of 21336006 is 60063312.

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

21336006 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21336001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1777995 + ... + 1778006.

It is an arithmetic number, because the mean of its divisors is an integer number (5334003).

Almost surely, 2^21336006 is an apocalyptic number.

21336006 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21336006 is a wasteful number, since it uses less digits than its factorization.

21336006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556006.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 21336006 is about 4619.0914691095. The cubic root of 21336006 is about 277.3560912789.

Adding to 21336006 its reverse (60063312), we get a palindrome (81399318).

The spelling of 21336006 in words is "twenty-one million, three hundred thirty-six thousand, six".