21704302 has 8 divisors (see below), whose sum is σ = 32968800. Its totient is φ = 10714704.

The previous prime is 21704299. The next prime is 21704303. The reversal of 21704302 is 20340712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21704302.

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68527 + ... + 68842.

It is an arithmetic number, because the mean of its divisors is an integer number (4121100).

Almost surely, 2^21704302 is an apocalyptic number.

21704302 is a deficient number, since it is larger than the sum of its proper divisors (11264498).

21704302 is a wasteful number, since it uses less digits than its factorization.

21704302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137450.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 21704302 is about 4658.7876105270. The cubic root of 21704302 is about 278.9428761576.

The spelling of 21704302 in words is "twenty-one million, seven hundred four thousand, three hundred two".