21330106266460 has 96 divisors (see below), whose sum is σ = 46650703377600. Its totient is φ = 8182395217920.

The previous prime is 21330106266451. The next prime is 21330106266473. The reversal of 21330106266460 is 6466260103312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51436104 + ... + 51849136.

It is an arithmetic number, because the mean of its divisors is an integer number (485944826850).

Almost surely, 2^{21330106266460} is an apocalyptic number.

21330106266460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21330106266460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23325351688800).

21330106266460 is an abundant number, since it is smaller than the sum of its proper divisors (25320597111140).

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

21330106266460 is a wasteful number, since it uses less digits than its factorization.

21330106266460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413671 (or 413669 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 40.

Adding to 21330106266460 its reverse (6466260103312), we get a palindrome (27796366369772).

The spelling of 21330106266460 in words is "twenty-one trillion, three hundred thirty billion, one hundred six million, two hundred sixty-six thousand, four hundred sixty".