21323696 has 20 divisors (see below), whose sum is σ = 41815032. Its totient is φ = 10532736.

The previous prime is 21323693. The next prime is 21323707. The reversal of 21323696 is 69632312.

It is a super-2 number, since 2×21323696² = 909400022200832, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21323693) 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 3 ways as a sum of consecutive naturals, for example, 6701 + ... + 9356.

Almost surely, 2^21323696 is an apocalyptic number.

It is an amenable number.

21323696 is a deficient number, since it is larger than the sum of its proper divisors (20491336).

21323696 is a wasteful number, since it uses less digits than its factorization.

21323696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16148 (or 16142 counting only the distinct ones).

The product of its digits is 11664, while the sum is 32.

The square root of 21323696 is about 4617.7587637294. The cubic root of 21323696 is about 277.3027399890.

The spelling of 21323696 in words is "twenty-one million, three hundred twenty-three thousand, six hundred ninety-six".