21034264 has 16 divisors (see below), whose sum is σ = 40086720. Its totient is φ = 10344480.

The previous prime is 21034261. The next prime is 21034297. The reversal of 21034264 is 46243012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21064 + ... + 22039.

It is an arithmetic number, because the mean of its divisors is an integer number (2505420).

Almost surely, 2^21034264 is an apocalyptic number.

It is an amenable number.

21034264 is a deficient number, since it is larger than the sum of its proper divisors (19052456).

21034264 is a wasteful number, since it uses less digits than its factorization.

21034264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43170 (or 43166 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 21034264 is about 4586.3126801386. The cubic root of 21034264 is about 276.0423865449.

Adding to 21034264 its reverse (46243012), we get a palindrome (67277276).

The spelling of 21034264 in words is "twenty-one million, thirty-four thousand, two hundred sixty-four".