21829616 has 10 divisors (see below), whose sum is σ = 42294912. Its totient is φ = 10914800.

The previous prime is 21829607. The next prime is 21829627. The reversal of 21829616 is 61692812.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 682160 + ... + 682191.

Almost surely, 2^21829616 is an apocalyptic number.

It is an amenable number.

21829616 is a deficient number, since it is larger than the sum of its proper divisors (20465296).

21829616 is a wasteful number, since it uses less digits than its factorization.

21829616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364359 (or 1364353 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 21829616 is about 4672.2174606925. The cubic root of 21829616 is about 279.4786898797.

The spelling of 21829616 in words is "twenty-one million, eight hundred twenty-nine thousand, six hundred sixteen".