21667096 has 16 divisors (see below), whose sum is σ = 44319240. Its totient is φ = 9848640.

The previous prime is 21667091. The next prime is 21667097. The reversal of 21667096 is 69076612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21667091) by changing a digit.

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, 123021 + ... + 123196.

Almost surely, 2^21667096 is an apocalyptic number.

It is an amenable number.

21667096 is an abundant number, since it is smaller than the sum of its proper divisors (22652144).

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

21667096 is a wasteful number, since it uses less digits than its factorization.

21667096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246234 (or 246230 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 21667096 is about 4654.7927988257. The cubic root of 21667096 is about 278.7833949547.

The spelling of 21667096 in words is "twenty-one million, six hundred sixty-seven thousand, ninety-six".