21733696 has 14 divisors (see below), whose sum is σ = 43127930. Its totient is φ = 10866816.

The previous prime is 21733687. The next prime is 21733717. The reversal of 21733696 is 69633712.

21733696 = 19² + 20² + ... + 402².

It can be written as a sum of positive squares in only one way, i.e., 11999296 + 9734400 = 3464^2 + 3120^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169731 + ... + 169858.

Almost surely, 2^21733696 is an apocalyptic number.

It is an amenable number.

21733696 is a deficient number, since it is larger than the sum of its proper divisors (21394234).

21733696 is an equidigital number, since it uses as much as digits as its factorization.

21733696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339601 (or 339591 counting only the distinct ones).

The product of its digits is 40824, while the sum is 37.

The square root of 21733696 is about 4661.9412265708. The cubic root of 21733696 is about 279.0687428834.

The spelling of 21733696 in words is "twenty-one million, seven hundred thirty-three thousand, six hundred ninety-six".