21327198592 has 128 divisors (see below), whose sum is σ = 50980285440. Its totient is φ = 8689072128.

The previous prime is 21327198583. The next prime is 21327198631. The reversal of 21327198592 is 29589172312.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3438438 + ... + 3444634.

It is an arithmetic number, because the mean of its divisors is an integer number (398283480).

Almost surely, 2^21327198592 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 21327198592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25490142720).

21327198592 is an abundant number, since it is smaller than the sum of its proper divisors (29653086848).

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

21327198592 is a wasteful number, since it uses less digits than its factorization.

21327198592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6408 (or 6396 counting only the distinct ones).

The product of its digits is 544320, while the sum is 49.

The spelling of 21327198592 in words is "twenty-one billion, three hundred twenty-seven million, one hundred ninety-eight thousand, five hundred ninety-two".