21330334 has 8 divisors (see below), whose sum is σ = 32199768. Its totient is φ = 10597080.

The previous prime is 21330313. The next prime is 21330347. The reversal of 21330334 is 43303312.

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

It is a plaindrome in base 13 and base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33652 + ... + 34279.

It is an arithmetic number, because the mean of its divisors is an integer number (4024971).

Almost surely, 2^21330334 is an apocalyptic number.

21330334 is a deficient number, since it is larger than the sum of its proper divisors (10869434).

21330334 is a wasteful number, since it uses less digits than its factorization.

21330334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68090.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 21330334 is about 4618.4774547463. The cubic root of 21330334 is about 277.3315114962.

Adding to 21330334 its reverse (43303312), we get a palindrome (64633646).

The spelling of 21330334 in words is "twenty-one million, three hundred thirty thousand, three hundred thirty-four".