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20068754055181 = 131543750311937
BaseRepresentation
bin1001001000000100111101…
…11101001110000000001101
32122001112221222100101112221
410210002132331032000031
510112301302014231211
6110403243000055341
74140630301605226
oct444023675160015
978045858311487
1020068754055181
116438124522347
122301561164551
13b2762456b520
144d54935c424d
hex12409ef4e00d

20068754055181 has 4 divisors (see below), whose sum is σ = 21612504367132. Its totient is φ = 18525003743232.

The previous prime is 20068754055179. The next prime is 20068754055209. The reversal of 20068754055181 is 18155045786002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1100682149956 + 18968071905225 = 1049134^2 + 4355235^2 .

It is a cyclic number.

It is not a de Polignac number, because 20068754055181 - 21 = 20068754055179 is a prime.

It is a super-2 number, since 2×200687540551812 (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20068754055101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771875155956 + ... + 771875155981.

It is an arithmetic number, because the mean of its divisors is an integer number (5403126091783).

Almost surely, 220068754055181 is an apocalyptic number.

It is an amenable number.

20068754055181 is a deficient number, since it is larger than the sum of its proper divisors (1543750311951).

20068754055181 is a wasteful number, since it uses less digits than its factorization.

20068754055181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543750311950.

The product of its (nonzero) digits is 2688000, while the sum is 52.

The spelling of 20068754055181 in words is "twenty trillion, sixty-eight billion, seven hundred fifty-four million, fifty-five thousand, one hundred eighty-one".

Divisors: 1 13 1543750311937 20068754055181