21332230272 has 96 divisors (see below), whose sum is σ = 61548942000. Its totient is φ = 7091836416.

The previous prime is 21332230267. The next prime is 21332230289. The reversal of 21332230272 is 27203223312.

It is a happy number.

21332230272 is a `hidden beast` number, since 21 + 332 + 2 + 302 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 412179 + ... + 461037.

Almost surely, 2^21332230272 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 21332230272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30774471000).

21332230272 is an abundant number, since it is smaller than the sum of its proper divisors (40216711728).

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

21332230272 is a wasteful number, since it uses less digits than its factorization.

21332230272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49258 (or 49243 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

Adding to 21332230272 its reverse (27203223312), we get a palindrome (48535453584).

The spelling of 21332230272 in words is "twenty-one billion, three hundred thirty-two million, two hundred thirty thousand, two hundred seventy-two".