21001334 has 8 divisors (see below), whose sum is σ = 31814208. Its totient is φ = 10396600.

The previous prime is 21001319. The next prime is 21001349. The reversal of 21001334 is 43310012.

It is an interprime number because it is at equal distance from previous prime (21001319) and next prime (21001349).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51782 + ... + 52185.

It is an arithmetic number, because the mean of its divisors is an integer number (3976776).

Almost surely, 2^21001334 is an apocalyptic number.

21001334 is a deficient number, since it is larger than the sum of its proper divisors (10812874).

21001334 is a wasteful number, since it uses less digits than its factorization.

21001334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104070.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21001334 is about 4582.7212439772. The cubic root of 21001334 is about 275.8982594269.

Adding to 21001334 its reverse (43310012), we get a palindrome (64311346).

The spelling of 21001334 in words is "twenty-one million, one thousand, three hundred thirty-four".