21432096 has 72 divisors (see below), whose sum is σ = 69660864. Its totient is φ = 6122880.

The previous prime is 21432091. The next prime is 21432097. The reversal of 21432096 is 69023412.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (21432091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3300 + ... + 7331.

It is an arithmetic number, because the mean of its divisors is an integer number (967512).

Almost surely, 2^21432096 is an apocalyptic number.

It is an amenable number.

21432096 is an abundant number, since it is smaller than the sum of its proper divisors (48228768).

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

21432096 is a wasteful number, since it uses less digits than its factorization.

21432096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10654 (or 10643 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 21432096 is about 4629.4811804348. The cubic root of 21432096 is about 277.7718397783.

The spelling of 21432096 in words is "twenty-one million, four hundred thirty-two thousand, ninety-six".