21327168 has 56 divisors (see below), whose sum is σ = 56985408. Its totient is φ = 7038976.

The previous prime is 21327157. The next prime is 21327181. The reversal of 21327168 is 86172312.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21205 + ... + 22187.

Almost surely, 2^21327168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21327168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28492704).

21327168 is an abundant number, since it is smaller than the sum of its proper divisors (35658240).

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

21327168 is a wasteful number, since it uses less digits than its factorization.

21327168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111 (or 1101 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 21327168 is about 4618.1346883780. The cubic root of 21327168 is about 277.3177896449.

The spelling of 21327168 in words is "twenty-one million, three hundred twenty-seven thousand, one hundred sixty-eight".