21034276 has 6 divisors (see below), whose sum is σ = 36809990. Its totient is φ = 10517136.

The previous prime is 21034261. The next prime is 21034297. The reversal of 21034276 is 67243012.

It can be written as a sum of positive squares in only one way, i.e., 20702500 + 331776 = 4550^2 + 576^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21034276.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2629281 + ... + 2629288.

Almost surely, 2^21034276 is an apocalyptic number.

It is an amenable number.

21034276 is a deficient number, since it is larger than the sum of its proper divisors (15775714).

21034276 is a wasteful number, since it uses less digits than its factorization.

21034276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5258573 (or 5258571 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 21034276 is about 4586.3139883789. The cubic root of 21034276 is about 276.0424390387.

Adding to 21034276 its reverse (67243012), we get a palindrome (88277288).

The spelling of 21034276 in words is "twenty-one million, thirty-four thousand, two hundred seventy-six".