21796896 has 48 divisors (see below), whose sum is σ = 62421408. Its totient is φ = 6604800.

The previous prime is 21796891. The next prime is 21796903. The reversal of 21796896 is 69869712.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (21796891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9265 + ... + 11376.

It is an arithmetic number, because the mean of its divisors is an integer number (1300446).

Almost surely, 2^21796896 is an apocalyptic number.

It is an amenable number.

21796896 is an abundant number, since it is smaller than the sum of its proper divisors (40624512).

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

21796896 is a wasteful number, since it uses less digits than its factorization.

21796896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20665 (or 20657 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 21796896 is about 4668.7145982594. The cubic root of 21796896 is about 279.3389849424.

The spelling of 21796896 in words is "twenty-one million, seven hundred ninety-six thousand, eight hundred ninety-six".