20685703113216 has 120 divisors (see below), whose sum is σ = 59706341338644. Its totient is φ = 6894541209600.

The previous prime is 20685703113203. The next prime is 20685703113239. The reversal of 20685703113216 is 61231130758602.

It is a happy number.

20685703113216 is a `hidden beast` number, since 2 + 0 + 6 + 8 + 5 + 7 + 0 + 311 + 321 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20638485561600 + 47217551616 = 4542960^2 + 217296^2 .

It is a super-2 number, since 2×20685703113216² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46675066 + ... + 47116166.

Almost surely, 2^{20685703113216} 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 20685703113216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29853170669322).

20685703113216 is an abundant number, since it is smaller than the sum of its proper divisors (39020638225428).

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

20685703113216 is a wasteful number, since it uses less digits than its factorization.

20685703113216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451302 (or 451283 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 20685703113216 in words is "twenty trillion, six hundred eighty-five billion, seven hundred three million, one hundred thirteen thousand, two hundred sixteen".