21703275660 has 192 divisors, whose sum is σ = 67111317504. Its totient is φ = 5196921600.

The previous prime is 21703275653. The next prime is 21703275683. The reversal of 21703275660 is 6657230712.

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 63 ways as a sum of consecutive naturals, for example, 24467737 + ... + 24468623.

It is an arithmetic number, because the mean of its divisors is an integer number (349538112).

Almost surely, 2^21703275660 is an apocalyptic number.

21703275660 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 21703275660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33555658752).

21703275660 is an abundant number, since it is smaller than the sum of its proper divisors (45408041844).

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

21703275660 is a wasteful number, since it uses less digits than its factorization.

21703275660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324 (or 1322 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 39.

The spelling of 21703275660 in words is "twenty-one billion, seven hundred three million, two hundred seventy-five thousand, six hundred sixty".