20650173221340 has 240 divisors, whose sum is σ = 69771855384000. Its totient is φ = 5082508062720.

The previous prime is 20650173221329. The next prime is 20650173221351. The reversal of 20650173221340 is 4312237105602.

20650173221340 is a `hidden beast` number, since 20 + 6 + 5 + 0 + 1 + 73 + 221 + 340 = 666.

It is an interprime number because it is at equal distance from previous prime (20650173221329) and next prime (20650173221351).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20650173221295 and 20650173221304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 189464460 + ... + 189573420.

It is an arithmetic number, because the mean of its divisors is an integer number (290716064100).

Almost surely, 2^{20650173221340} is an apocalyptic number.

20650173221340 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 20650173221340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34885927692000).

20650173221340 is an abundant number, since it is smaller than the sum of its proper divisors (49121682162660).

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

20650173221340 is a wasteful number, since it uses less digits than its factorization.

20650173221340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117994 (or 117983 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 20650173221340 in words is "twenty trillion, six hundred fifty billion, one hundred seventy-three million, two hundred twenty-one thousand, three hundred forty".