21704300 has 36 divisors (see below), whose sum is σ = 47496960. Its totient is φ = 8608320.

The previous prime is 21704299. The next prime is 21704303. The reversal of 21704300 is 340712.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21704303) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 11846 + ... + 13554.

It is an arithmetic number, because the mean of its divisors is an integer number (1319360).

Almost surely, 2^21704300 is an apocalyptic number.

21704300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21704300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23748480).

21704300 is an abundant number, since it is smaller than the sum of its proper divisors (25792660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21704300 is a wasteful number, since it uses less digits than its factorization.

21704300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850 (or 1843 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 21704300 is about 4658.7873958789. The cubic root of 21704300 is about 278.9428675896.

The spelling of 21704300 in words is "twenty-one million, seven hundred four thousand, three hundred".