21959696 has 20 divisors (see below), whose sum is σ = 46415184. Its totient is φ = 9981600.

The previous prime is 21959689. The next prime is 21959761. The reversal of 21959696 is 69695912.

It is a self number, because there is not a number n which added to its sum of digits gives 21959696.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62210 + ... + 62561.

Almost surely, 2^21959696 is an apocalyptic number.

It is an amenable number.

21959696 is an abundant number, since it is smaller than the sum of its proper divisors (24455488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21959696 is a wasteful number, since it uses less digits than its factorization.

21959696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124790 (or 124784 counting only the distinct ones).

The product of its digits is 262440, while the sum is 47.

The square root of 21959696 is about 4686.1173694222. The cubic root of 21959696 is about 280.0327172654.

The spelling of 21959696 in words is "twenty-one million, nine hundred fifty-nine thousand, six hundred ninety-six".