20713366338840 has 192 divisors, whose sum is σ = 77017477642560. Its totient is φ = 4729430384640.

The previous prime is 20713366338829. The next prime is 20713366338859. The reversal of 20713366338840 is 4883366331702.

20713366338840 is a `hidden beast` number, since 207 + 1 + 3 + 3 + 66 + 338 + 8 + 40 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2024881 + ... + 6747360.

It is an arithmetic number, because the mean of its divisors is an integer number (401132696055).

Almost surely, 2^{20713366338840} is an apocalyptic number.

20713366338840 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 20713366338840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38508738821280).

20713366338840 is an abundant number, since it is smaller than the sum of its proper divisors (56304111303720).

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

20713366338840 is a wasteful number, since it uses less digits than its factorization.

20713366338840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8773202 (or 8773195 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 54.

The spelling of 20713366338840 in words is "twenty trillion, seven hundred thirteen billion, three hundred sixty-six million, three hundred thirty-eight thousand, eight hundred forty".