21326065224 has 16 divisors (see below), whose sum is σ = 53315163120. Its totient is φ = 7108688400.

The previous prime is 21326065223. The next prime is 21326065237. The reversal of 21326065224 is 42256062312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21326065223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444293002 + ... + 444293049.

It is an arithmetic number, because the mean of its divisors is an integer number (3332197695).

Almost surely, 2^21326065224 is an apocalyptic number.

21326065224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21326065224 is an abundant number, since it is smaller than the sum of its proper divisors (31989097896).

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

21326065224 is a wasteful number, since it uses less digits than its factorization.

21326065224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888586060 (or 888586056 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The spelling of 21326065224 in words is "twenty-one billion, three hundred twenty-six million, sixty-five thousand, two hundred twenty-four".