21052334 has 16 divisors (see below), whose sum is σ = 33127488. Its totient is φ = 10022112.

The previous prime is 21052333. The next prime is 21052349. The reversal of 21052334 is 43325012.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21052331) 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, 452 + ... + 6504.

It is an arithmetic number, because the mean of its divisors is an integer number (2070468).

Almost surely, 2^21052334 is an apocalyptic number.

21052334 is a deficient number, since it is larger than the sum of its proper divisors (12075154).

21052334 is a wasteful number, since it uses less digits than its factorization.

21052334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6139.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 21052334 is about 4588.2822493827. The cubic root of 21052334 is about 276.1214109124.

Adding to 21052334 its reverse (43325012), we get a palindrome (64377346).

The spelling of 21052334 in words is "twenty-one million, fifty-two thousand, three hundred thirty-four".