21327272712 has 96 divisors (see below), whose sum is σ = 59454046080. Its totient is φ = 6901614720.

The previous prime is 21327272711. The next prime is 21327272717. The reversal of 21327272712 is 21727272312.

It is a super-2 number, since 2×21327272712² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21327272711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1224787 + ... + 1242077.

It is an arithmetic number, because the mean of its divisors is an integer number (619312980).

Almost surely, 2^21327272712 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 21327272712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29727023040).

21327272712 is an abundant number, since it is smaller than the sum of its proper divisors (38126773368).

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

21327272712 is a wasteful number, since it uses less digits than its factorization.

21327272712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17803 (or 17796 counting only the distinct ones).

The product of its digits is 32928, while the sum is 36.

The spelling of 21327272712 in words is "twenty-one billion, three hundred twenty-seven million, two hundred seventy-two thousand, seven hundred twelve".