21707368075776 has 80 divisors (see below), whose sum is σ = 57848555517984. Its totient is φ = 7233440784384.

The previous prime is 21707368075759. The next prime is 21707368075781. The reversal of 21707368075776 is 67757086370712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2443500 + ... + 7027476.

Almost surely, 2^{21707368075776} 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 21707368075776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28924277758992).

21707368075776 is an abundant number, since it is smaller than the sum of its proper divisors (36141187442208).

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

21707368075776 is an equidigital number, since it uses as much as digits as its factorization.

21707368075776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4587081 (or 4587065 counting only the distinct ones).

The product of its (nonzero) digits is 145212480, while the sum is 66.

The spelling of 21707368075776 in words is "twenty-one trillion, seven hundred seven billion, three hundred sixty-eight million, seventy-five thousand, seven hundred seventy-six".