21034336 has 12 divisors (see below), whose sum is σ = 41411412. Its totient is φ = 10517152.

The previous prime is 21034331. The next prime is 21034357. The reversal of 21034336 is 63343012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328630 + ... + 328693.

It is an arithmetic number, because the mean of its divisors is an integer number (3450951).

Almost surely, 2^21034336 is an apocalyptic number.

It is an amenable number.

21034336 is a deficient number, since it is larger than the sum of its proper divisors (20377076).

21034336 is an equidigital number, since it uses as much as digits as its factorization.

21034336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657333 (or 657325 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 21034336 is about 4586.3205295749. The cubic root of 21034336 is about 276.0427015076.

Adding to 21034336 its reverse (63343012), we get a palindrome (84377348).

The spelling of 21034336 in words is "twenty-one million, thirty-four thousand, three hundred thirty-six".