21327133604 has 48 divisors (see below), whose sum is σ = 44989056000. Its totient is φ = 8641813536.

The previous prime is 21327133579. The next prime is 21327133621. The reversal of 21327133604 is 40633172312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227747 + ... + 307445.

It is an arithmetic number, because the mean of its divisors is an integer number (937272000).

Almost surely, 2^21327133604 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 21327133604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22494528000).

21327133604 is an abundant number, since it is smaller than the sum of its proper divisors (23661922396).

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

21327133604 is a wasteful number, since it uses less digits than its factorization.

21327133604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80232 (or 80230 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 32.

The spelling of 21327133604 in words is "twenty-one billion, three hundred twenty-seven million, one hundred thirty-three thousand, six hundred four".