21552896 has 18 divisors (see below), whose sum is σ = 43022112. Its totient is φ = 10776320.

The previous prime is 21552893. The next prime is 21552911. The reversal of 21552896 is 69825512.

It is a pancake number, because a pancake can be divided into 21552896 parts by 6565 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21552893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41840 + ... + 42351.

Almost surely, 2^21552896 is an apocalyptic number.

It is an amenable number.

21552896 is a deficient number, since it is larger than the sum of its proper divisors (21469216).

21552896 is an frugal number, since it uses more digits than its factorization.

21552896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84207 (or 84193 counting only the distinct ones).

The product of its digits is 43200, while the sum is 38.

The square root of 21552896 is about 4642.5096661181. The cubic root of 21552896 is about 278.2927406429.

The spelling of 21552896 in words is "twenty-one million, five hundred fifty-two thousand, eight hundred ninety-six".