21034268 has 6 divisors (see below), whose sum is σ = 36809976. Its totient is φ = 10517132.

The previous prime is 21034261. The next prime is 21034297. The reversal of 21034268 is 86243012.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2629280 + ... + 2629287.

It is an arithmetic number, because the mean of its divisors is an integer number (6134996).

Almost surely, 2^21034268 is an apocalyptic number.

It is an amenable number.

21034268 is a deficient number, since it is larger than the sum of its proper divisors (15775708).

21034268 is a wasteful number, since it uses less digits than its factorization.

21034268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5258571 (or 5258569 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 21034268 is about 4586.3131162187. The cubic root of 21034268 is about 276.0424040428.

The spelling of 21034268 in words is "twenty-one million, thirty-four thousand, two hundred sixty-eight".