20665746751360 has 192 divisors, whose sum is σ = 51664001729760. Its totient is φ = 7904053555200.

The previous prime is 20665746751343. The next prime is 20665746751387. The reversal of 20665746751360 is 6315764756602.

It is a junction number, because it is equal to n+sod(n) for n = 20665746751295 and 20665746751304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1107420430 + ... + 1107439090.

Almost surely, 2^{20665746751360} is an apocalyptic number.

20665746751360 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 20665746751360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25832000864880).

20665746751360 is an abundant number, since it is smaller than the sum of its proper divisors (30998254978400).

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

20665746751360 is a wasteful number, since it uses less digits than its factorization.

20665746751360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21997 (or 21962 counting only the distinct ones).

The product of its (nonzero) digits is 38102400, while the sum is 58.

The spelling of 20665746751360 in words is "twenty trillion, six hundred sixty-five billion, seven hundred forty-six million, seven hundred fifty-one thousand, three hundred sixty".