21303734 has 8 divisors (see below), whose sum is σ = 32070168. Its totient is φ = 10613680.

The previous prime is 21303713. The next prime is 21303757. The reversal of 21303734 is 43730312.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18392 + ... + 19515.

It is an arithmetic number, because the mean of its divisors is an integer number (4008771).

Almost surely, 2^21303734 is an apocalyptic number.

21303734 is a deficient number, since it is larger than the sum of its proper divisors (10766434).

21303734 is a wasteful number, since it uses less digits than its factorization.

21303734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38190.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 21303734 is about 4615.5968194807. The cubic root of 21303734 is about 277.2161814247.

The spelling of 21303734 in words is "twenty-one million, three hundred three thousand, seven hundred thirty-four".