21303704 has 16 divisors (see below), whose sum is σ = 41681520. Its totient is φ = 10188640.

The previous prime is 21303697. The next prime is 21303707. The reversal of 21303704 is 40730312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303707) 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, 57707 + ... + 58074.

It is an arithmetic number, because the mean of its divisors is an integer number (2605095).

Almost surely, 2^21303704 is an apocalyptic number.

It is an amenable number.

21303704 is a deficient number, since it is larger than the sum of its proper divisors (20377816).

21303704 is a wasteful number, since it uses less digits than its factorization.

21303704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115810 (or 115806 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 21303704 is about 4615.5935696289. The cubic root of 21303704 is about 277.2160512990.

The spelling of 21303704 in words is "twenty-one million, three hundred three thousand, seven hundred four".