21830068 has 36 divisors (see below), whose sum is σ = 42385728. Its totient is φ = 9828000.

The previous prime is 21830063. The next prime is 21830071. The reversal of 21830068 is 86003812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21830063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28693 + ... + 29443.

Almost surely, 2^21830068 is an apocalyptic number.

It is an amenable number.

21830068 is a deficient number, since it is larger than the sum of its proper divisors (20555660).

21830068 is a wasteful number, since it uses less digits than its factorization.

21830068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 21830068 is about 4672.2658314783. The cubic root of 21830068 is about 279.4806188111.

The spelling of 21830068 in words is "twenty-one million, eight hundred thirty thousand, sixty-eight".