21727068 has 24 divisors (see below), whose sum is σ = 55305600. Its totient is φ = 6583920.

The previous prime is 21727009. The next prime is 21727081. The reversal of 21727068 is 86072712.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82168 + ... + 82431.

It is an arithmetic number, because the mean of its divisors is an integer number (2304400).

Almost surely, 2^21727068 is an apocalyptic number.

It is an amenable number.

21727068 is an abundant number, since it is smaller than the sum of its proper divisors (33578532).

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

21727068 is a wasteful number, since it uses less digits than its factorization.

21727068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164617 (or 164615 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 21727068 is about 4661.2303096929. The cubic root of 21727068 is about 279.0403713371.

The spelling of 21727068 in words is "twenty-one million, seven hundred twenty-seven thousand, sixty-eight".