21004334 has 12 divisors (see below), whose sum is σ = 34117056. Its totient is φ = 9694152.

The previous prime is 21004331. The next prime is 21004351. The reversal of 21004334 is 43340012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30734 + ... + 31409.

It is an arithmetic number, because the mean of its divisors is an integer number (2843088).

Almost surely, 2^21004334 is an apocalyptic number.

21004334 is a deficient number, since it is larger than the sum of its proper divisors (13112722).

21004334 is a wasteful number, since it uses less digits than its factorization.

21004334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62171 (or 62158 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 21004334 is about 4583.0485487282. The cubic root of 21004334 is about 275.9113959792.

Adding to 21004334 its reverse (43340012), we get a palindrome (64344346).

The spelling of 21004334 in words is "twenty-one million, four thousand, three hundred thirty-four".