21330007 has 8 divisors (see below), whose sum is σ = 21658320. Its totient is φ = 21003840.

The previous prime is 21329999. The next prime is 21330047. The reversal of 21330007 is 70003312.

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 21330007 - 2³ = 21329999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330047) 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 7 ways as a sum of consecutive naturals, for example, 39157 + ... + 39697.

It is an arithmetic number, because the mean of its divisors is an integer number (2707290).

Almost surely, 2^21330007 is an apocalyptic number.

21330007 is a deficient number, since it is larger than the sum of its proper divisors (328313).

21330007 is an equidigital number, since it uses as much as digits as its factorization.

21330007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 21330007 is about 4618.4420533336. The cubic root of 21330007 is about 277.3300942990.

Adding to 21330007 its reverse (70003312), we get a palindrome (91333319).

The spelling of 21330007 in words is "twenty-one million, three hundred thirty thousand, seven".